cover Advertising Envelopes 1862-1950 (c.) superb collection including 1862 2c. "Black Jack" on "Percy's Collecting Agency" (N.Y.) cover, and Great Western Sanitary Fair Cincinnati, 1869 3c. on covers (3), 1880 (c.) covers (2) showing philatelic advertising, also numerous hotels, construction suppliers, clothing manufacturers, institutions, medical with 1868 (c.) "Condell's Life Like Limb Co.", food and beverage manufacturers. (148)