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    A Survey of the River St. Lawrence From Lake Ontario to the Galop Rapids in Five Sheets by Captn W. F. W. Owen, R. N. 1818 Sheet 1 N.B. The soundings are in feet London: Published according to Act of Parliament at the Hydrographical Office of the Admiralty 16 July ...

    River St. Lawrence Sheet II The soundings are in feet London: Published according to Act of Parliament at the Hydrographical Office of the Admiralty 12 Aug 1828.

    River St. Lawrence Sheet III The soundings are in feet London: Published according to Act of Parliament at the Hydrographical Office of the Admiralty 22 Aug 1828.

    River St. Lawrence Sheet IV The soundings are in feet London: Published according to Act of Parliament at the Hydrographical Office of the Admiralty 9 Aug 1828.

    River St. Lawrence Sheet V The soundings are in feet London: Published according to Act of Parliament at the Hydrographical Office of the Admiralty 5 Aug 1828.

    North American Lakes River St. Lawrence Quebec to Kingston with Lake Ontario and Lake Champlain From the latest British and United States Government Surveys, 1876 ... Magnetic Variation in 1880; increasing about 4' annually. All bearings are Magnetic Soundings in Fathoms London. Published at the Admiralty, 20th Jan'y 1880, under ...

    North America River St. Lawrence Montreal to Ogden Island Montreal to Lachine Rapids, from a Survey by Captain H. W. Bayfield, R. N. 1858 St. Regis to Ogden Island from the United States Government Survey 1871-3 Magnetic Variation in 1912, increasing about 1' annually. Soundings in Feet. Reduced to ordinary ...