Boston. Harbor. Maps.
"Map 81.39.1868 Massachusetts. Board of harbor commissioners.
Plan of main ship channel in Boston harbor, showing the work of removing certain obstructions to navigation.
[Boston, 1868.] Size, 17 7/8 x 22 3/4 inches. Scale, 1:5000 (or 416 2/3 feet to 1 inch). Cut from its report, Jan., 1868 [ *6358.56.1868].