BONNET à pretre, or PRIEST'S BONNET, in fortification, VOL. I. No. 25.
is an out-work, having at the head three salient angles, and two inwards. It differs from the double tenaille only in this, that its sides, instead of being parallel, are like the queue d'aronde or swallow's tail, that is, narrowing, or drawing close at the gorge, and opening at the head.