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- Lake Huron - North Channel: Clapperton I to Mildram Pt. [1889]Lake Huron - North Channel Clapperton I. to Mildram Pt. Surveyed by Staff Commander J. G. Boulton, R. N., assisted by Messrs. W. J. Stewart and D. C. Campbell, 1887-8. under the orders of the Government of the Dominion of Canada. Magnetic Variation in 1889, increasing 4' annually. All ...Lake Huron - North Channel Clapperton I. to Mildram Pt. Surveyed by Staff Commander J. G. Boulton, R. N., assisted by Messrs. W. J. Stewart and D. C. Campbell, 1887-8. …Maritime History of the Great Lakes
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