"Proof corrected in Office of P.R.R. Surveys, Feb 10th 1855. All copies printed prior to this date contain errors. G. K. Warren. Lieut. Topl. Engrs." Description derived from published bibliography. Sheet  From St Paul to Riviere des Lacs.--Sheet  From Riviere des Lacs to the Rocky Mountains.--Sheet  From the Rocky Mountains to Puget Sound.
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