1955. Scott Engineering Company (Alpena, Mich.). Scale [1:47,520]. 3/4" = 1 mi; Inset of Charity Island and Little Charity Island.
    
  
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      1926. W.W. Hixson & Co. Publication date estimated by the path of Route 23.  Scale approximately 1:51,000. W.W. Hixson & Co.