Pacer, AKA The Hancock Mare; AKA the Whynot Mare; AKA Joseph Hancocks Black Pacing Mare. Owned 1820-27 by Joseph Hancock, Salem, NJ, who sold her to Powell Carpenter, Philadelphia, PA, who sold her to Daniel Jeffreys, Germantown, PA. Dam of Andrew Jackson, 2:31 1/2 According to American Stallion Register Vol I p 100 this mare was described as a stout, black, short-legged mare, of unknown origin that was sold in a drove of horses that came from Ohio, no knowledge of her history or breeding. This mare and others in the drove were sold to the merchants Martin & Jacobs of Philadelphia before passing through the above owners and given the name Charcoal Sal by the Jeffries. The cross to Messenger seems highly unlikely. Wallace's Year-Book, 1888, Vol. III, p.258 says: dam a trotter and pacer from Ohio, PEDIGREE UNKNOWN. ( no name!).
The whole complicated story in: "The National Live-Stock Journal", August 1874, p. 279-280. Informations confirm what has been written here!