Large steam derrick handling big pieces of granite on wharf at Clark Island, St. George, Maine.

Large steam derrick handling big pieces of granite on wharf at Clark Island, St. George, Maine.

Large steam derrick handling big pieces of granite on wharf at Clark Island, St. George, Maine. Note: 1 of series of 7 c.1873 unattributed photos of operations on Clark Island (LB2013.21.1857 - 1863)