1. Mail routes. Schedule of mail routes, no. 558, Apr. 1, 1947, 3d division, Railway Mail Service, comprising District of Columbia, Maryland, North Carolina, Virginia, and West Virginia (except peninsula of Maryland and Virgnia). Bookmark Corporate/Agency Authors: Surface Postal Transport Division and Post Office Department Publisher: Surface Postal Transport Division Date: [1947.] SuDoc number: P 10.12/3:558