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current20:17, 17 August 2010Thumbnail for version as of 20:17, 17 August 2010586 × 379 (61 KB)PgrigMap is from the Supplement of the report by the U.S. Army Engineers on the Defenses of Boston Harbor, 1945. The two 16-inch gun positions of Battery Long are clearly visible, as well as the magazines, mechanical spaces, and plotting rooms in the undergrou

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