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    Georgian Bay Penetanguishene Harbour Surveyed by Lieut. Henry W. Bayfield, R. N. 1822 Magnetic Variation in 1863, increasing 4' annually. -- Georgian Bay Collingwood harbour Surveyed by Mr. Wm. Gibbard, C.E. April 1858 -- Goderich Harbour Surveyed by Mr. F. A. Wise July 1861 Lighthouse, Lat. 49. 45' 0 N. ...

    Georgian Bay Penetanguishene Harbour Surveyed by Lieut. Henry W. Bayfield, R. N. 1822 -- Georgian Bay Collingwood harbour Surveyed by Mr. Wm. Gibbard, C.E. April 1858 -- Goderich Harbour Surveyed by Mr. F. A. Wise July 1861 Lighthouse, Lat. 49. 45' 0 N. Long 81. 41'. W. from Greenwich (Approximate) ...

    Canada Lake Huron Goderich to Chantry Island Surveyed by Mr. W. J. Stewart, assisted by Messrs F. Anderson, and R. E. Tyrwhitt, 1900-1. under the orders of the Government of the Dominion of Canada All heights are expressed in feet above the mean level of the Lake Magnetic Variation in ...

    Canada Lake Huron St. Clair River to Goderich Surveyed by Mr. W. J. Stewart, assisted by Messrs F. Anderson, and R. E. Tyrwhitt, 1901. under the orders of the Government of the Dominion of Canada St. Clair River to Cape Ipperwash from the United States Government Survey, 1859. All heights ...