"Plan of lots in the borough of Lawrenceville: Being the subdivision of out lots No's. 18 & 19 in Wm. B. Foster's plan of Lawrenceville: Laid off at the request of Robert Robb for the heirs of Peter Dravo dec'd." Laid out Feb. 22, 1851; recorded Mar. 14, 1851, Plan Book 1, pp. 194–195. Allegheny County Recorder of Deeds 3778285.