Wells, Fargo & Co, Pony Express, $1.00 red, four mostly large even margins, on red PAID / Wells, Fargo & Co. printed frank 10c green star die stationery cover, postmarked "St. Joseph Mo. / Sep / 14", adhesive tied by faint "Wells, Fargo & Co / Carson City" oval, date indistinct, to Philadelphia, some light uniform wear from use, small gum adhesion on stamp, entire repaired at left, else scarce and fine.  (FWK Census E152).  This cover, a way letter, was carried on the eastern journey of the Pony Express, departing San Francisco on Saturday, August 31, 1861, arriving in St. Joseph two weeks later on September 14. It is one of only five way letters recorded carried during the Fourth Rate Period, and the only recorded example carried on this trip.