(Hudson River Route 810) 1845 (Sep. 7) Albany N.Y. to New York N.Y., light blue folded cover with red "U.S. Express Mail N.Y. 'Albany' Sep 7" cds and matching "5" rating for the new rate for under 300 miles effective July 1st, Very Fine, a scarce route agent marking. Estimate  $300 - 400. $0 (Image)