Southern Overland Mail and Express Co., Barlow & Sanderson Proprietors, Principle Office, Pueblo, Col., corner card on cover with illustrated design showing Six Horse Stage on Mountain Road, Stage with "Overland U.S. Mail/B.S. & Co." imprint, franked with 3¢ Banknote tied by cork handstamp, matching "Pueblo, Colo., Oct 30" cds above; cover reduced at right slightly into illustration, otherwise Very Fine, ex-Bauer. Estimate  $1,000 - 1,500. Barlow and Sanderson was a dominant express company in southern Colorado and the San Juan Mountain region. It eventually gave way to the advancing railroads. $0 (Image)