Our first discovery was a Nissen hut in a dank field on the eastern outskirts.
In fact, the room was very much of the shape and size of a Nissen hut.
Camblain l'Abb was not a large place, so we were cramped for room, and a Nissen hut had to be built for "C" mess.
Page 66: "Nisson" changed to "Nissen" (the shape and size of a Nissen hut).
Personally, I don't like a Nissen hut nearly as much as the ordinary straight-walled sort.