Boundary Under the Treaty of Washington of August 9th 1842. Islands in the River Saint John

Islands in the River Saint John, showing to which government each belongs, as determined by the channel of deepest soundings / surveyed on the part of the United States in 1843 by Lieut. George Thom, Topographical Engineers ; soundings made in 1843 by Lieut. T.J. Lee, Topographical Engineers under instructions from Major J.D. Graham. Topographical Engineers, Principal Astronomer and Head of the Scientific Corps, ; drawn by J.F. Burgin. 4 map sections on 4 sheets : hand colored, mounted on cardboardhttps://digitalmaine.com/nebd_maps/1001/thumbnail.jp