Sources:

• GHS: Jellett, Edwin C. "Germantown Historical Miscellany," p. 232: 1848 advertisement from the "Germantown Telegraph," 1848:
  "To Rent,
  "Two new stone houses, on Centre street, each having 5 rooms, cellar and kitchen. Inquire of Daniel Culp, corner of Main and Manheim sts., or No. 7 Centre street, Germantown"