Approximately 279 maps. Most ca. 1840-1880. Includes several early 19th century maps and documents. Primarily relating to the contiguous Philadelphia neighborhoods of Northern Liberies, Callowhill, Old City, Society Hill, Bella Vista, and adjacent areas. Also several manuscript maps relating to areas in the northwest portion of Philadelphia County, the western reaches of Center City, Philadelphia. Primarily ink on paper folio sheets, several sheet with color wash features.