Preliminary sketch showing the soundings off the sea coast of Delaware and MarylandUnited States Coast SurveyBache, A. D.Lee, Samuel PhillipsEnglishMap1850[Washington, D.C. : United States Coast Survey], 1850.Atlantic Coast (Del.)—MapsAtlantic Coast (Md.)—MapsNorth Atlantic Ocean—NavigationCoasts—Delaware—MapsCoasts—Maryland—MapsMaps—Delaware—1850Maps—Maryland—1850Nautical charts—Delaware—1850Nautical charts—Maryland—1850MapsMap