This early map provides a detailed picture of a strip of land 27 miles wide between Baltimore and Philadelphia, on a scale of three miles to the inch. It was issued by S. Bernard, Brigr. Genl. and William Tell Poussin, Capt. Top. Engrs, both on the Board of Internal Improvement. The map was a result of a Maryland petition for improvement of the existing mail road and shows several combinations of alternate post routes from Baltimore to Philadelphia. The map is oriented with north to the top right so that the possible routes could flow from left (Baltimore) to right (Philadelphia). Some roads are named and all are identified as projected, traveled or turnpike. Included with the map is a tabular page showing the mail road crossing points on the Susquehanna River.

References: Claussen & Friis #7 or #9.

Condition: B

Issued folding with scattered foxing.