Source:Gregg-coal-hill-lots-plan
From Pittsburgh Streets
"Plan of Building Lots Situated on Carson Street and Brownsville Turnpike Road Near the Southern End of the Monongahela River Bridge: Being a part of the Coal Hill Lots Tract in the Manor of Pittsburgh, now 17th & 18th Wards, laid off for the heirs of Sidney Gregg at the request of O. O. Gregg." Laid out Nov. 7, 1845; recorded Oct. 5, 1846, Plan Book 1, p. 111. Allegheny County Recorder of Deeds 3778212.
