referring now to the drawings in detail , wherein like numerals indicate like elements throughout the several views , an array of mailboxes 10 are adapted to be disposed between pair of parallel , supporting wood frame members 12 , 14 ( see fig1 ). the mailbox assembly 10 consists of a plurality of module frames 16 whose side frame members 18 , 20 are abutted to leave the perception of a plurality of individual horizontal and vertical boxes 38 supported between frame members 12 , 14 . each of the modules 16 is connected to one of the frame members 12 , 14 as will be described in more detail hereinafter by threaded fasteners 26 ( see fig3 ). if one of the module frames 16 is damaged or any of the mailboxes 38 seated within a module frame 16 is damaged or tampered with , either the module frame or the individual box need be replaced and not the entire assembly or array 10 . while each module frame 16 is disclosed as containing six mailboxes , it will be understood that any number , as desired , may be retained within one of the module frames 16 . each of the module frames 16 is fabricated from angle iron stock preferably 3 / 16th of an inch thick whose legs are 11 / 4 inches × 2 inches . each module is formed , as illustrated more clearly in fig1 and 2 , from left and right parallel upright angle iron members 28 and 30 , respectively . the same type of angle stock is welded horizontally across the members 28 , 30 as indicated at 32 . each of the members 32 is on the order of 9 and 1 / 16 inches long and there is about 61 / 2 inch vertical spacing between each of the cross members 32 . each cross piece 32 is cut or notched , as indicated in fig2 in the opposite corner areas 34 between the vertical and horizontal legs so that the cutout areas 34 will fit into the corners of the respective , adjacent upright member 28 , 30 and can be welded or otherwise secured to each of the shorter , coplanar legs of the upright members 28 , 30 at spaced locations therealong to form an opening 36 through an elongated metal receptacle or box 38 is slidably received . the box 38 is fabricated so as to be open at opposite ends . for this purpose , box 38 is preferably constituted of 18 gauge sheet metal and fabricated as two pieces ; one piece comprising two side panels and an integral top panel and the other piece comprising a bottom panel that this welded to the side panels to form a rectangular parallelepiped construction . the dimensions of each box are roughly 61 / 4 inches wide , 5 inches high and 15 inches deep . each box 38 is provided with an upwardly extending mounting flange 40 secured to the top panel of the box and opposed side mounting flanges 42 , 44 extending laterally outwardly from each of the side walls of the box 38 . holes 46 are provided in each of the flanges 40 , 42 and 44 to enable each compartment or box 38 to be secured to the shorter legs which face inwardly from each of the adjacent angle iron members 28 , 30 , and 32 by aligning the openings 46 in each of the flanges 40 , 42 , 44 with a complementary opening 48 and a tamperproof screw such as 50 is inserted therethrough which receives a nut 52 on a threaded shank 54 . as shown the tamperproof screws or threaded fasteners 50 comprise spanner - type screws having a pair of spaced openings 56 in their heads 58 which receive a spanner - type wrench ( not shown ) in order to rotate the head 58 of threaded fastener 50 . use of the tamperproof threaded spanners or screws 50 discourages any attempt at disassembly of the boxes 38 from a module frame 16 . welded to the lower or bottom wall of each of the compartments or boxes 38 is one part of a hinge 60 . the other part of hinge 60 is welded to a door 62 which normally covers or spans the front opening 64 of each box 38 . as indicated in fig1 and 3 , the doors 62 can normally be swung downwardly about the hinges 60 . the interior of door 62 is provided with a key - operated rotatable latch 68 , adapted to be pivoted and received behind a latch plate 70 mounted on the back of each cross piece 32 . latch 68 is pivotable through an opening 72 provided in the top wall of box 38 . each of the latch plates 70 is disposed behind the downwardly extending leg of each of the cross pieces 32 except the lower most one in the module frame 16 . because of the construction described , replacement of a particular compartment or box 38 and its door 62 is facilitated , since these components are connected by the hinge 60 and no welds are made to either the legs of the upright angle members 28 , 30 or the cross pieces 32 . such replacement might be necessitated if one of the compartments of boxes 38 would be inadvertently damaged , for example , during an attempt to pry open the cover 62 on the compartment or box 38 . further , due to the arrangement described , each of the doors 62 , when closed , is completely recessed by an inch or so behind the front edges of each of the upright angle iron members 28 , 30 and cross pieces 32 which bars access to the cracks between the doors on the one hand , and the upright members 28 , 30 and cross pieces 32 on the other . as a consequence , any attempt or effort to pry open a locked door 62 , as by insertion of a screwdriver , crowbar , or other sharpedged tool between the door and any of the upright angle iron members 28 , 30 or cross pieces 32 will be prevented . preferably , the door 62 is also formed from 12 gauge steel , which is sufficiently heavy to withstand an attempt to puncture it with a sharp pointed instrument . another desirable feature of the module construction is that when a door 62 is locked , the door completely conceals the spanner - type threaded fasteners 50 which are employed to mount each of the boxes or compartments 38 on the module frame 16 . thus , access to these mounting screws 50 is also barred , minimizing the possibility of unauthorized personnel attempting to remove the screws . as indicated in fig3 and 11 , each of the modules 16 is connected by threaded fasteners 26 received through an opening 48 in the downwardly extending leg of the lowermost cross piece 32 , and an extension of latch plate 70 to the bottom horizontal support 14 and top horizontal support 12 of the mailbox assembly 10 . access to each of the modules 16 and individual compartments or boxes 38 can be had from the rear of each box 38 through a door 73 connected by a hinge 74 to an upright angle iron member 76 extending about one of the side edges of the rear of each compartment or box 38 . angle iron member 76 is secured to side wall panels of boxes 38 at spaced locations by threaded fasteners 78 . each door 73 associated with each one of the modules 16 includes a cross piece 77 which extends between a pair of spaced , but vertically stacked ones of the boxes or compartments 38 and which is connected to upright support angle iron 76 . the cross piece 77 is provided with a rearwardly projecting pin 80 received within a push button operated locking cap 82 which when depressed can be removed from pin 80 permitting the door 73 to be swung about hinge 74 to expose the rear of each of the compartments 38 . the locking cap 82 and pin 80 are stock items manufactured by southco , inc . of concordville , pa . with reference to fig4 it will be appreciated that the locking mechanism 66 provided on the door 62 , when the door 62 is fully open , may extend into the path of movement of any parcel housed within its associated compartment or box 38 . in order to avoid this , a door such as door 84 can be provided which is illustrated in fig8 and 8a . the door 84 includes an identical locking mechanism 66 as that already discussed in conjunction with the door 62 , but in lieu of the hinge 60 , a double hinge plate 86 , 88 is provided . the hinge portion 88 is welded or otherwise secured to the top of each cross piece 32 , except the top most one , so that when the door 84 is pivoted about hinge 87 , it will drop down completely away from the opening into the interior of each compartment 38 as illustrated in phantom lines in fig8 a to enable a parcel to be removed without any impediment in its path . alternatively , as shown in fig9 and 9a a double hinge can be provided which is welded to the side wall along the leg of the one of upright members 28 , 30 so that a door 90 will be swung laterally as indicated in fig9 a out of the path of the opening into box 38 . alternatively , the weld can be to the flange 42 or 44 . a single plate type hinge may be connected directly to the flange 42 as illustrated in fig1 so that a door 98 can be opened about the hinges as indicated in phantom lines in fig1 to swing out of the way of the opening into the interior of the box 38 so as not to impede the removal of a parcel or any other material from the interior of the box 38 .