Progress Map for 1893: Canapitsit Channel, Mass. From 1. July 1892 to 30 June 1893.
Description:
"Canpitsit Channel between Cuttyhunk & Nashawena Islands connecting Buzzards Bay with Vineyard Sound" "Original map made by J. H. Rostock 1891. Reduced & drawn in office of Captain W. H. Bixby, Corps of Engrs, U.S.A. by P. Brosig, 1893."