This relatively scarce and most interesting map has red overprinted lines indicating the district boundaries and yellow ones distinguishing the states and territories. Today's Arizona is part of the large New Mexico Territory, Nebraska includes the present states of the Dakotas and Wyoming, West Virginia has not separated from Virginia, Utah spans from California to Kansas, and Washington and Oregon extend to the Continental Divide. The Indian Territory is unnamed. Burr was 'Geographer and Draftsman to the Senate' between 1855-59. On two joined sheets, as issued.

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Condition: A

On sound paper that is quite clean less a line of toning along paste line where sheets are joined.