the present invention is a fence - frame - to - post connection 1 . the connection 1 comprises an elongated fence post member 2 , a fence frame member 3 disposed closely adjacent to the elongated post member 2 , and a fence - frame - to - post connector 4 for attaching the frame member 3 and the post member 2 . as shown in fig2 , 10 , 12 and 20 the fence post member 2 preferably supports connector 4 , which supports the fence frame member 3 , which supports a plurality of fence boards 30 . the connector 4 includes an interface member 5 and a retention member 11 . preferably , the interface member 5 is between the post member 2 and the frame member 3 . the retention member 11 preferably clamps the post member 2 to the interface member 5 . the interface member 5 includes a central portion 6 , first and second laterally - spaced fastening portions 8 , and first and second interface portions 10 . the interface member 5 preferably has a top edge 37 , a bottom edge 38 , and two side edges 39 . in the preferred embodiments shown in fig1 - 10 , inclusive , the central portion 6 , first and second laterally - spaced fastening portions 8 , and first and second interface portions 10 are created by cutting two separate sections out of the interior of the interface member 5 . this creates two interior openings 35 in the interface member 5 , each having an inner edge 36 . preferably , the inner edges 36 are interrupted by two straight , vertical and mutually parallel bends ; the inner edge 36 of each has two straight , horizontal and mutually parallel portions that are also parallel to the top edge 37 and the bottom edge 38 of the interface member 5 ; these horizontal portions are joined by arched portions near the two side edges 39 . in these embodiments , the central portion 6 , first and second laterally - spaced fastening portions 8 , and first and second interface portions 10 have an upper edge 40 and a lower edge 41 at different levels than the top edge 37 and the bottom edge 38 of the whole interface member 5 . the first and section interface portions 10 are the two horizontally - separated ends of the horizontally - oriented rectangle of the interface member 5 . in all preferred embodiments , the first and second laterally - spaced fastening portions 8 , and the first and second interface portions 10 are substantially planar . in the preferred embodiments shown in fig1 - 26 , inclusive , the central portion 6 , first and second laterally - spaced fastening portions 8 , and first and second interface portions 10 occupy the vertical center of the interface member 5 and have an upper edge 40 and a lower edge 41 that are coincident with the top edge 37 and the bottom edge 38 of the whole interface member 5 . preferably , the shape of the interface member 5 is horizontally symmetrical ( the left and right sides mirroring each other ), with a concave vertical cylinder section in the center of the central portion 6 . the first and second ends 6 are the straight , vertical edges of the cylinder section , and the first and second laterally - spaced fastening portions 8 are planar rectangles , the inner sides of which are the first and second ends 6 , the outer sides of which are parallel first and second outer edges 9 , the same length as the first and second ends 6 . the fastening portions 8 are parallel to the outer side 25 of the fence frame member 3 . the first and second connection portions 23 are joined to the first and second ends 6 and angle toward the fence frame member 3 . the connection portions 23 are also planar . the top edge 37 of the interface member 5 is horizontal in the central portion 6 , through the fastening portions 8 , and into the connection portions 23 . the same is true of the bottom edge 38 of the interface member 5 . approximately midway through the connection portions 23 , the top edge 37 and the bottom edge 38 both angle downward until they reach the first and second interface portions 10 of the interface member 5 . the interface portions 10 branch out to either side of the connection portions 23 , are planar , and are parallel to the outer side 25 of the fence frame member 3 . the bottom edge 38 is horizontal in the interface portions 10 , and the top edge 37 is horizontal and parallel except where the outermost upper corners of the interface member 5 are notched . the first and second support tabs 27 are planar , meet the bottom edges 38 of the interface portions 10 at ninety - degree angles , and point toward the fence boards 30 , interfacing with the bottom side 26 of the fence frame member 3 . in all preferred forms , the central portion 6 is at least partially curvilinear , with an inner surface 31 that partially matches the outer surface 32 of the post member 2 , which is preferably a vertically - oriented cylinder . in the preferred embodiments shown in fig1 - 10 , inclusive , the curvilinear part 34 of the central portion 6 is interrupted where the central portion 6 attaches to the first and second interface portions 10 . in the preferred embodiments shown in fig1 - 26 , inclusive , the curvilinear part 34 of the central portion 6 is uninterrupted . in the preferred embodiments shown in fig1 - 10 , inclusive , the central portion 6 includes two short spacer portions 33 that hold the frame member 3 away from the post member 2 so that moisture does not collect between the two . in the preferred embodiments shown in fig1 - 26 , inclusive , the whole central portion 6 is held away from the frame member 3 . the retention member 11 includes a middle portion 12 , third and fourth laterally - spaced fastening portions 14 , and first and second tabs 16 . in all of the preferred embodiments , the middle portion 12 of the retention member 11 is curvilinear , with an inner surface 42 that partially matches the outer surface 32 of the post member 2 . in all of the preferred embodiments , the third and fourth laterally - spaced fastening portions 14 , and the first and second tabs 16 are substantially planar . a first plurality of fasteners 19 fastens the interface member 5 to the fence frame member 3 . a second plurality of fasteners 28 fastens the retention member 11 to the interface member 5 . preferably , fasteners 19 that fasten the interface member 5 to the fence frame member 3 are self - tapping wood screws 19 . in the preferred embodiments shown in fig1 - 10 , inclusive , one of the second plurality of fasteners 28 is a key tab 17 that interlocks with a key slot 18 , forming a hinged connection 29 between the interface member 5 and the retention member 11 . as shown , the key tab 17 is cut out of the material of the third laterally - spaced fastening portion 14 of the retention member 11 and is bent toward the interface member 5 and fence frame member 3 . the key tab 17 has a constricted portion 43 that extends from the fastening portion 14 and the key tabs 17 ends in an expanded portion 44 . the key slot 18 is cut in the first laterally - spaced fastening portion 8 of the interface member 5 and has a restricted portion 45 and an enlarged portion 46 . the expanded portion 44 of the key tab 17 is passed through the enlarged portion 46 of the key slot 18 and the constricted portion 43 of the key tab 17 is then slid into the restricted portion 45 of the key slot 18 , trapping the expanded portion of the key tab 17 on one side of the key slot 18 and preventing the key tab 17 from withdrawing from the key slot 18 . the other of the second plurality of fasteners 28 is preferably a metal screw 28 . although the key tab 17 is preferably part of the retention member 11 and the key slot 18 is preferably part of the interface member 5 , the locations of the two can be reversed , so that the key tab 17 is in the interface member 5 and the key slot 18 is in the retention member 11 . the disadvantage in such a reversal is that the key tab 17 would project out . the central portion 6 of the interface member 5 partially encompasses the post member 2 . the central portion 6 has first and second ends 7 laterally spaced from one another . preferably , the first and second ends 7 are vertical and linear . the first and second laterally - spaced fastening portions 8 of the interface member 5 are attached to the first and second ends 7 of the central portion 6 . the first and second fastening portions 8 have first and second outer edges 9 , respectively . the first and second outer edges 9 are laterally spaced away from the first and second ends 7 , respectively , of the central portion 6 . in the preferred embodiments shown in fig1 - 10 , inclusive , the first and second outer edges 9 are arced . the first and second interface portions 10 adjoin and are fastened to the fence frame member 3 . preferably , each of the first and second interface portions 10 is fastened with two fasteners 19 . preferably , each of the first and second interface portions 10 includes two fastener openings 49 . the middle portion 12 of the retention member 11 partially encompasses the post member 2 . the middle portion 12 has third and fourth ends 13 laterally spaced from one another . preferably , the third and fourth ends 13 are vertical and linear . the third and fourth laterally - spaced fastening portions 14 of the retention member 11 are attached to the third and fourth ends 13 of the middle portion 12 . the third and fourth fastening portions 14 have fifth and sixth ends 15 laterally spaced away from the third and fourth ends 13 of the middle portion 12 . the third and fourth fastening portions 14 are fastened to the first and second fastening portions 8 of the interface member 5 . preferably , the fifth and sixth ends 15 are vertical and linear . the first and second tabs 16 of the retention member 11 are angularly attached to the fifth and sixth ends 15 of the third and fourth fastening portions 14 along first and second bend lines 55 , respectively . the first and second bend lines 55 are aligned with at least a portion of the first and second outer edges 9 , respectively , of the first and second laterally - spaced fastening portions 8 of the interface member 5 . this means that the retention member 11 is horizontally self - aligning against the interface member 5 . preferably , the first and second tabs 16 each have an arced outer edge 47 . a first plurality of fasteners 19 , separate from the connector 4 , fasten the first and second interface portions 10 of the interface member 5 to the fence frame member 3 . a second plurality of fasteners 28 , separate from the first plurality of fasteners 19 , fasten the third and fourth fastening portions 14 of the retention member 11 to the first and second fastening portions 8 of the interface member , respectively . the first and second tabs 16 of the retention member 11 preferably are bent toward the fence frame member 3 . preferably , at least one of the fasteners 28 of the second plurality of fasteners 28 has a pointed tip 48 oriented toward the fence frame member 3 . the first and second tabs 16 shield the pointed tips 48 of the fasteners 28 of the second plurality of fasteners 28 that have pointed tips 48 . the central portion 6 of the interface member 5 preferably is channel - shaped . preferably , the middle portion 12 of the retention member 11 is also channel - shaped . the first and second interface portions 10 of the interface member 5 preferably extend laterally beyond the first and second laterally - spaced fastening portions 8 , respectively . preferably , each of the first and second tabs 16 is attached to one of the fifth and sixth ends 15 at an angle that is neither 90 nor 180 degrees . the first and second interface portions 10 of the interface member 5 preferably interface with and are fastened to the fence frame member 3 . the middle portion 12 of the retention member 11 registers with and partially embraces the post member 2 . preferably , the interface member 5 is joined to the retention member 11 by a hinged connection 29 . the third fastening portion 14 of the retention member 11 preferably is fastened to the first fastening portion 8 of the interface member 5 with an integral key tab 17 that extends from the third fastening portion 14 and is received by a key slot 18 in the first fastening portion 8 . the integral key tab 17 and the key slot form the hinged connection 29 . preferably , the fourth fastening portion 14 of the retention member 11 is fastened to the second fastening portion 8 of the interface member 5 with a separate fastener 28 . the first plurality of fasteners 19 preferably are identical to each other . preferably , the second plurality of separate fasteners 28 are identical to each other when not in a hinged connection . in the embodiments shown in fig1 - 18 , the first and second fastening portions 8 each preferably supports a nut 20 that receives one of the second plurality of fasteners 28 . preferably , the first and second fastening portions 8 each supports one of the nuts 20 with a dimple 21 in each of the first and second fastening portions 8 . as shown in fig1 and 15 , the first and second interface portions 10 preferably are connected to the first and second fastener - receiving portions 8 by intervening first and second connection portions 23 that are attached to the first and second outer edges 9 of the fastening portions 8 and are angularly related to both the interface portions 10 and the fastening portions 8 . preferably , the first connection portion 23 of the interface member 5 includes a nut - restraining tab 22 that restrains the nut 20 that is supported by the dimple 21 in the first fastening portion 8 against rotation . the second connection portion 23 of the interface member 5 preferably includes a nut - restraining tab 22 that restrains the nut 20 that is supported by the dimple 21 in the first fastening portion 8 against rotation . the nut - restraining tabs 22 are cut out of the central material of the first and second connection portions 23 of the interface member 5 adjacent the first and second outer edges 9 of the first and second fastening portions . preferably , matching nut - restraining tabs 22 are cut out of the central material of the central portion 6 of the interface member 5 adjacent the first and second ends 7 of the central portion 6 . preferably , as shown in fig1 - 26 , inclusive , the first and second interface portions 10 are connected to the first and second fastener - receiving portions 8 by intervening first and second connection portions 23 that are attached to the first and second outer edges 9 of the fastening portions 8 and are angularly related to both the interface portions 10 and the fastening portions 8 . the angle between the first and second connection portions 23 and the fastening portions 8 is the same as the angle of the attachment between the first and second tabs 16 and the fifth and sixth ends 15 of the retention member 11 . the fence frame member 3 preferably is a substantially horizontal fence runner 3 with a top side 24 , an outer side 25 , and a bottom side 26 . the interface member 5 includes first and second support tabs 27 projecting from the first and second interface portions 10 and interfacing with the bottom side 26 of the fence runner 3 . preferably , the majority of the post member 2 is a cylinder having a radius dimension , and the central portion 6 of the interface member 5 has a radius dimension substantially equal to or greater than the radius dimension of the post member . the post member 2 preferably is metal . preferably , the frame member 3 is wood . the post member 2 preferably has a circumference dimension , and the central portion 6 of the interface member 5 has an arc dimension greater than half of the circumference dimension of the post member 2 . the present invention includes a method of forming a fence - frame - to - post connection 1 . the method comprises providing an elongated fence post member 2 , disposing a fence frame member 3 , providing a fence - frame - to - post connector 4 , snapping the post member 2 into place , closing the connector 4 and fastening the connector 4 to the fence frame member 3 . the majority of the elongated fence post member 2 is a cylinder having a radius dimension and a circumference dimension . the fence frame member 3 is disposed closely adjacent to the elongated post member 2 . the fence - frame - to - post connector 4 is for attaching the frame member 3 and the post member 2 . the connector 4 includes an interface member 5 and a retention member 11 . the interface member 5 includes a central portion 6 , first and second laterally - spaced fastening portions 8 , and first and second interface portions 10 . the central portion 6 partially encompasses the post member 2 . the central portion 6 has first and second ends 7 laterally spaced from one another . the first and second laterally - spaced fastening portions 8 are attached to the first and second ends 7 of the central portion 6 . the first and second fastening portions 8 have first and second outer edges 9 , respectively . the first and second outer edges 9 are laterally spaced away from the first and second ends 7 , respectively , of the central portion 6 . the first and second interface portions 10 adjoin and are fastened to the fence frame member 3 . the retention member 11 includes a middle portion 12 , third and fourth laterally - spaced fastening portions 14 , and first and second tabs 16 . the middle portion 12 partially encompasses the post member 2 . the middle portion 12 has third and fourth ends 13 laterally spaced from one another . third and fourth laterally - spaced fastening portions 14 are attached to the third and fourth ends 13 of the middle portion 12 . the third and fourth fastening portions 14 have fifth and sixth ends 15 laterally spaced away from the third and fourth ends 13 of the middle portion 12 . the third and fourth fastening portions 14 are fastened to the first and second fastening portions 8 of the interface member 5 . first and second tabs 16 are angularly attached to the fifth and sixth ends 15 of the third and fourth fastening portions 14 along first and second bend lines 55 , respectively . the first and second bend lines 55 are aligned with at least a portion of the first and second outer edges 9 , respectively , of the first and second laterally - spaced fastening portions 8 of the interface member 5 . the post member 2 is snapped into the central portion 6 of the interface member 5 . the third fastening portion 14 of the retention member 11 is fastened to the first fastening portion 8 of the interface member 5 . the fourth fastening portion 14 of the retention member 11 is fastened to the second fastening portion 8 of the interface member 5 . preferably , the first and second interface portions 10 of the interface member 5 interface with and are fastened to the fence frame member 3 . the middle portion 12 of the retention member 11 registers with and partially embraces the post member 2 . the present invention includes another method of forming a fence - frame - to - post connection 1 . this method also comprises providing an elongated fence post member 2 , disposing a fence frame member 3 , providing a fence - frame - to - post connector 4 , snapping the post member 2 into place , closing the connector 4 and fastening the connector 4 to the fence frame member 3 . an elongated fence post member 2 is provided , a fence frame member 3 is disposed closely adjacent to the elongated post member 2 , and a fence - frame - to - post connector 4 for attaching the frame member 3 and the post member 2 is provided . the connector 4 includes an interface member 5 and a retention member 11 . the interface member 5 includes a central portion 6 , first and second laterally - spaced fastening portions 8 , and first and second interface portions 10 . the central portion 6 partially encompasses the post member 2 . the central portion 6 has first and second ends 7 laterally spaced from one another . the first and second laterally - spaced fastening portions 8 are attached to the first and second ends 7 of the central portion 6 . the first and second fastening portions 8 have first and second outer edges 9 , respectively . the first and second outer edges 9 are laterally spaced away from the first and second ends 7 , respectively , of the central portion 6 . the first and second interface portions 10 adjoin and are fastened to the fence frame member 3 . the retention member 11 includes a middle portion 12 , third and fourth laterally - spaced fastening portions 14 , and first and second tabs 16 . the middle portion 12 partially encompasses the post member 2 . the middle portion 12 has third and fourth ends 13 laterally spaced from one another . third and fourth laterally - spaced fastening portions 14 are attached to the third and fourth ends 13 of the middle portion 12 . the third and fourth fastening portions 14 have fifth and sixth ends 15 laterally spaced away from the third and fourth ends 13 of the middle portion 12 . the third and fourth fastening portions 14 are fastened to the first and second fastening portions 8 of the interface member 5 . first and second tabs 16 are angularly attached to the fifth and sixth ends 15 of the third and fourth fastening portions 14 along first and second bend lines 55 , respectively . the first and second bend lines 55 are aligned with at least a portion of the first and second outer edges 9 , respectively , of the first and second laterally - spaced fastening portions 8 of the interface member 5 . the third fastening portion 14 of the retention member 11 is fastened to the first fastening portion 8 of the interface member 5 with an integral key tab 17 that extends from the third fastening portion 14 and is received by a key slot 18 in the first fastening portion 8 . the retention member 11 is pivoted on the interface between the integral key tab 17 and the key slot 18 to bring the fourth fastening portion 14 of the retention member 11 together with the second fastening portion 8 of the interface member 5 the fourth fastening portion 14 of the retention member 11 is fastened to the second fastening portion 8 of the interface member 5 with a separate fastener 28 . preferably , the first and second interface portions 10 of the interface member 5 interface with the fence frame member 3 . the middle portion 12 of the retention member 11 registers with the post member 2 . in a preferred embodiment , the fence - frame - to - post connection 1 comprises an elongated fence post member 2 , a fence frame member 3 , and a fence - frame - to - post connector 4 . the fence frame member 3 is disposed closely adjacent to the elongated post member 2 . the fence - frame - to - post connector 4 attaches the frame member 3 and the post member 2 . the connector 4 includes an interface member 5 and a retention member 11 . the interface member 5 includes a central portion 6 , first and second laterally - spaced fastening portions 8 , and first and second interface portions 10 . the retention member 11 includes a middle portion 12 , third and fourth laterally - spaced fastening portions 14 . the interface member 5 is joined to the retention member 11 by a hinged connection 29 . the central portion 6 of the interface member 5 partially encompasses the post member 2 . the central portion 6 has first and second ends 7 laterally spaced from one another . the first and second laterally - spaced fastening portions 8 of the interface member 5 are attached to the first and second ends 7 of the central portion 6 . the first and second fastening portions 8 have first and second outer edges 9 , respectively . the first and second outer edges 9 are laterally spaced away from the first and second ends 7 , respectively , of the central portion 6 . the first and second interface portions 10 adjoin and are fastened to the fence frame member 3 . the middle portion 12 of the retention member 12 partially encompasses the post member 2 . the middle portion 12 has third and fourth ends 13 laterally spaced from one another . the third and fourth laterally - spaced fastening portions 14 are attached to the third and fourth ends 13 of the middle portion 12 . the third and fourth fastening portions 14 have fifth and sixth ends 15 laterally spaced away from the third and fourth ends 13 of the middle portion 12 . the third and fourth fastening portions 14 are fastened to the first and second fastening portions 8 of the interface member 5 . preferably , the third fastening portion 14 of the retention member 11 is fastened to the first fastening portion 8 of the interface member 5 with an integral key tab 17 that extends from the third fastening portion 14 and is received by a key slot 18 in the first fastening portion 8 . the integral key tab 17 and the key slot form the hinged connection 29 . the fourth fastening portion 14 of the retention member 11 is fastened to the second fastening portion 8 of the interface member 5 with a separate fastener 28 . alternately , the hinged connection 29 can be a barrel - and - pin hinge 28 , or the hinged connection 29 can be a strap hinge 28 . preferably , first and second tabs 16 are angularly attached to the fifth and sixth ends 15 of the third and fourth fastening portions 14 along first and second bend lines 55 , respectively . the first and second bend lines 55 are aligned with at least a portion of the first and second outer edges 9 , respectively , of the first and second laterally - spaced fastening portions 8 of the interface member 5 . the connector 4 is preferably formed from 12 gauge g90 a - 653 ss gf33 galvanized sheet steel , with a minimum thickness of 0 . 099 inches , a minimum yield strength of 33 ksi , and a minimum tensile strength of 45 ksi , but any other suitable material can be used . in the most preferred form of the invention , best shown in fig9 and 10 , the greatest distance between the arced outer edges 47 of the retention member 11 is 5 19 / 32 inches . the retention member 11 preferably has an upper edge 51 and a lower edge 52 and these are 1 inch apart and generally parallel . preferably , there is an obround fastener opening 50 in the fourth fastening portion 11 with a width of 7 / 16 inches and a width of 9 / 32 inches . the fastener opening is preferably 11 / 16 inches from the most distant part of the nearest arced outer edge 47 . the key tab 17 is preferably 9 / 16 inches long and ⅝ inches away from the most distant part of the nearest arced outer edge 47 . the center of the expanded portion 44 of the key tab 17 is 13 / 16 inches away from the most distant part of the nearest arced outer edge 47 . preferably , there is an additional round opening 53 in the center of the retention member 11 . in the most preferred form of the invention , best shown in fig9 and 10 , the fastener openings 49 in the interface member 5 are round and 9 / 32 inches in diameter . these fastener openings 49 preferably are centered 13 / 32 inches from the nearest of the top edge 37 and the bottom edge 38 of the interface member 5 . preferably , the top edge 37 and bottom edge 38 of the interface member 5 are 2 inches apart and generally parallel . the distance between the bottom edge 38 of the whole interface member 5 and the lower edge 41 of the central portion 6 preferably is ½ inches . preferably , the side edges 39 of the interface member 5 are 7¼ inches apart and generally parallel . the restricted portion 45 of the key slot 18 is preferably ¼ inches squared . the enlarged portion 46 of the key slot 18 preferably extends 3 / 16 inches beyond the restricted portion 45 and preferably is 7 / 16 inches wide . preferably , the enlarged portion 46 of the key slot 18 is 11 / 16 inches from the first outer edge 9 of the first fastening portion 8 of the interface member 5 . preferably , there is an additional round opening 54 in the center of the interface member 5 .