*Map 61.39.1868 Massachusetts. Board of harbor commissioners. Plan of main ship channel in Boston harbor, showé ing the work of removing certain obstructions to navigation. [Boston, 1868.] Size, 177/e x 22% inches. Scale, 125000 (or 4162/3 feet to 1 inch.) Cut from its report, Jan., 1868 [*6358.56.1868 ].
-Boston. Harbor.