Recherche dans la collection - SOREL. Plan of the northern portion of the seigniory with the islands attached showing the portions that are required to be retained for military purposes. T. Bury, Lieut. Royal Engineers, 4 october 1850. Henry Vavasour, Col., Comg. Rl Engineers Canada. 4 october 1850. Copy from plan recd from the Commander in chief. J. Nightingale, 22 May 1857. [cartographic material]