Collection search - Sketch of Dalhousie bastion shewing the proposed alterations to the gutters of Nos. 1,2,3 & 4 casemates to accompany este. dated 13 July 1843. Copy W.C. Menzies, Lt. Rl Engr 13th July 1843. P. Cole Major, Commg R. Engineer, Quebec Dt. [architectural drawing]