Source:O-o-gregg-plan
From Pittsburgh Streets
"Plan of town lots situated in the Manor of Pittsburg fronting on the Monongahela River, adjoining the west line of the Borough of Birmingham: Planned by O. O. Gregg: Laid out for N. B. Craig, committee of Sidney Gregg, and for O. Ormsby Gregg, Isaac Gregg, Sarah E. Gregg, and Sidney I. Gregg, proprietors." Laid out Nov. 10, 1835; recorded Nov. 30, 1835, Plan Book 1, pp. 44–45. Allegheny County Recorder of Deeds 3778155.
