1. Chart no. 1 of Apostle Islands including south coast of Lake Superior from Squaw Bay to Roys Point
1900. United States. Army. Corps of Engineers. (W 91°06ʻ--W 90°20ʻ/N 47°10ʻ--N 46°50ʻ). "Compiled under..., from U. S. Surveys made between the years of 1868 and 1899. Published 1900." 79 x 11... Corps of Engineers (Washington, D.C.?).