(Advertising/Illustrated) Texas Genl. Agency Office., For the Purchase & Sale of Real Estate & Negros, red embossed cameo corner card on backflap of cover to Mobile, Ala., franked with 1851, 3¢ dull red tied by light grid handstamp, matching "Austin, Texas, Feb 1" cds; light cover edge wear, otherwise Very Fine. Scott No. 11A  Estimate $200 - 300. $0 (Image)