Dovetail joint box work. It offers the strength found in the dovetail joint but is totally hidden from both outside faces by forming the outer edge to meet at a 45-degree angle while hiding the dovetails internally within the joint. The mitred corner dovetail joint is very similar in design, but it has just a single dovetail and is used for picture frames and other similar joins. The secret double-lapped dovetail is similar to the secret mitred dovetail, but presents a very thin section of end grain on one edge of the joint. Used for carcass and box construction to hide the
Mitre of a synod of bishops. During the 18th century (and in a few cases the 19th), soldiers designated as grenadiers in various northern European armies wore a mitre (usually called a "mitre cap") similar in outline to those worn by western bishops. As first adopted in the 1680s this cap had been worn instead of the usual broad-brimmed hat to avoid the headdress being knocked off when the soldier threw a grenade. The hand-grenade in its primitive form had become obsolete by the mid-18th century but grenadiers continued as elite troops in most European armies, usually retaining the mitre cap