Hocking Granite Works steam derrick loading granite blocks onto barge at Clark Island, Maine probably in the 1950's.

Hocking Granite Works steam derrick loading granite blocks onto barge at Clark Island, Maine probably in the 1950's.

Hocking Granite Works steam derrick loading granite blocks onto barge at Clark Island, Maine probably in the 1950's. Note: Coffin dates this photo to 1920's, but dump truck in photo appears to be a late 1940's Chevrolet.