Swart & Cos Express, Oakland (Cal.), mostly clear light red oval express company marking, also partly clear double circle datestamp 'Adams & Co., San Francisco', and ms. endorsement 'To be forwarded by Everts Snell & Co. Express to Onion Valley', pencil ms. '($)1.00' express company charge, on brown cover to Marysville Cal., slightly reduced at bottom, bottom back flap missing, light edgewear, still quite fresh and nearly fine, very scarce triple express company use, all out of the U.S. mail, Nathan reported this marking in blue