Collection search - S.P. No.21/A. Rideau Canal. Sketch shewing the land taken by Lieut. Colnl. By R.E. for the Rideau Canal, supposed to belong to Lot 40, 1st Con., Ottawa front, Township of Nepean (coloured yellow) and copied from a survey made about the year 1829-30, and by (blue lines) the true Boundaries of the Lots as determined by Survey made by D.P. Surveyor Mc Dermott in 1846. [cartographic material]