The Commemorative Biographical Record of Northeastern Penna, 1900, does state the following: "Emily C. [Bartleson] born June 18, 1837, is the wife of H.A. Lancaster a lumberman of Dreher township."
I also found a reference to H.A. and William in "The Greene Hills of Home" (published 3/1/1996 by the Greene Township Historical Society). This publication contained a list of people buried at the Zion Cemetery in Sterling Township. It states: "Lancaster, Grandfather and Grandmother, William Lancaster, 1756-1833; Ann, his wife, 1762-1839; Richard, Jr., 1811-1831; Jane, 1833-1843; Richard, 1794-1871; Frances McIIvain, his wife, 1793-1859; Lucy Mitchell, 1833-1855. Stone erected by H.A. Lancaster.