Erie, Pa. U. Blickensderfer, circa 1860s. First Edition. 4pp; two woodcut illustrations. "Cuts and grades over four feet deep, wide enough for laying Tile; it will work in Stiff, Moist, Clay or any Soil; and with one horse, Man and Boy, it will do the work of from 10 to 15 Men." Includes comparisons with other machines, endorsements in the press, etc. Self-wrappers. 8.75" x 5.5" Very Good. Item #040075
[Unrecorded by WorldCat. Romaine, American Trade Catalogs, cites the company at Stamford, Connecticut, not at Erie.].