File:A sketch of the navigation from Swan Pt. to the River Elk at the head of Chesapeak Bay. Sketch of the River Elk, at the head of Chesapeak Bay. LOC gm71002217.jpg
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![File:A sketch of the navigation from Swan Pt. to the River Elk at the head of Chesapeak Bay. Sketch of the River Elk, at the head of Chesapeak Bay. LOC gm71002217.jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/a/af/A_sketch_of_the_navigation_from_Swan_Pt._to_the_River_Elk_at_the_head_of_Chesapeak_Bay._Sketch_of_the_River_Elk%2C_at_the_head_of_Chesapeak_Bay._LOC_gm71002217.jpg/787px-thumbnail.jpg?20180603004806)
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