Engineers debated whether to build a Broad Sound channel marking lighthouse on the submerged Finn’s Ledge, or on the protruding parts of The Graves.
They opted for Graves Ledge. Here is a copy of the original Army Corps of Engineers sketch of the rocky ledge, courtesy of the Massachusetts Historical Society.
An Army Corps of Engineers overhead sketch of Graves Ledge, prior to construction of the lighthouse, shows parts of the ledge to be removed. (Photo courtesy of the Massachusetts Historical Society)
