Recherche dans la collection - Quebec. Plans & sections shewing the 3 new embrasures to be formed in the citadel es described in specification dated item 20 O.A.C. 1851-2. C.O. Streatfield, Lt. Col. C.R.E., C.E. 12 May 1851. Wm Chessell May 5, 1851. [architectural drawing]