BONNET

, in Fortification, a small work of two faces, having only a parapet, with two rows of palisadoes at about 10 or 12 feet distance. It is commonly placed before the saliant angle of the counterscarp, and having a communication with the covered way, by means of a trench cut through the glacis, and palisadoes on each side.

Bonnet à Prêtre, or Priest's Cap, is an outwork, having three saliant angles at the head, besides two inwards. It differs from the double tenaille only in this, that its sides, instead of being parallel, grow narrower, or closer, at the gorge, and opening at the front; from whence it is called queue d'aronde, or swallow's tail.