Survey of Lake Superior by Lieut Henry W'y Bayfield, R. N. assisted by Mr. Philip Ed. Collins, Mid. between the Years 1823 & 1825 NB The soundings are in Feet Sheet 1 --inset-- Track Survey of the Ri
Survey of Lake Superior by Lieut Henry W'y Bayfield, R. N. assisted …
Survey of Lake Superior by Lieut Henry W'y Bayfield, R. N. assisted by Mr. Philip Ed. Collins, Mid. between the Years 1823 & 1825 NB The soundings are in Feet Sheet 1 Variation in 1860, decreasing ab
Survey of Lake Superior by Lieut Henry W'y Bayfield, R. N. assisted …