Collection search - Montreal. Copied from a: "General Plan of the Ordnance Property situated immediatly on the left bank of the St Lawrence dated at Montreal 6th Sept. 1828. R.S. Piper Captn Royal Engineers. Copied by Charles Walkem Surveyor & draftsman Royal Engr Hd Qrs Office Montreal 15th May 1850. To accompany my report to the Comg Royal Engineers dated Montreal, 3d June 1850. Chas. Walkem Surveyor & draftsman R.E. deposty. [cartographic material]