Memoirs of the Historical Society of Pennsylvania: pt. 2 Remarks ... on Mercer County Pennsylvania by B. Stokely; Particular geographical description ... province on Pennsylvania by Francis Pastorius; Incidents in the early history of Crawford County, Pa. by Alfred Huidekoper; Description of economy, Beaver County, Pa. by R. Baker; Notes respecting the Indians of Lancaster County, Pa. by William Foulke