A map of Cape Cod annotated with the approximate locations of shipwrecks that were known as of 1903.  This area, known as "The Graveyard of the Atlantic Ocean," is reported to have had over 3,000 wrecks.  This is a section of a map drawn by the U.S. Engineer Office, Newport, RI.
United States Engineer Office, Newport, RI
<a rel="nofollow" class="external free" href="https://www.facebook.com/groups/685622308169421/permalink/2112705165461121/">https://www.facebook.com/groups/685622308169421/permalink/2112705165461121/</a>, found in <i>Cape Cod:Its People and their History</i>, by Henry C. Kittredge (1930)