This is a rare example of the c. 1887 U.S. Geological Survey map of the Muskeget Channel.  Extends eastward from Marthas Vineyard to include Muskeget Island, Tuckernuck Island, and the eastern parts of Nantucket.  Offers copious topographical detail as well as some submarine detail as well as towns, roads, and some individual buildings.  This map was originally dissected and mounted on linen by the Old Corner Book Store of 27-29 Bromfield Street, in Boston Massachusetts.
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<a href="https://en.wikipedia.org/wiki/United_States_Geological_Survey" class="extiw" title="en:United States Geological Survey">United States Geological Survey</a></div>
1887 (undated)
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