"Jas. Robinson & Wm. Forsyth's plan of building lots situated in the Borough of Lawrenceville: Laid out in Nov. 1850 by J. S. Devlin, C. E." Laid out Nov. 1850; recorded Aug. 25, 1851, Plan Book 1, p. 54. Allegheny County Recorder of Deeds 3778296.