Carte de la Baiae de Chesapeake
       Detail of "Carte de la Baiae de Chesapeake et de la Partie Navigible des Rivieres: James, York, Patowmack, Patuxent..." [Chart of the Chesapeake Bay and Detail of the Navigable Parts of the Rivers James, York, Potomac and Patuxent...] published by the Departemente de la Marine, Paris; 1778. Note that Bolingbroke is mistakenly shown as a town.

       The sailing directions for the Choptank river read: "The Choptank River can be navigated by boats up to the bridge, ie., they can go seven miles up into the Delaware Colony" (translation by Tom Edwards).