(U.S. Coast Survey). BOSTON HARBOR, MASSACHUSETTS by Alexander Dallas Bache. Map, lithograph with hand-coloring. Edition of 1863 with additions and corrections to the original 1857 edition. 28 x 36 inches. Darkened along the folds, but the folds unbroken, unevenly trimmed along the left edge, with the margin tapering very close to the border at the bottom, else a Very Good example of this rare chart.