One part of Tory doctor John Calef's two part map of the retreat.  Castine is in the lower left hand corner and the map is oriented with north pointing to the right.  The American fleet's difficulty getting up river is clearly depicted. From the Journal of Dr. John Calef, in Eyewitness Accounts of the American Revolution, 1779 Reprint (New York:The New York Times and Arno press, 1971).