Source:Mansion-house-plan
From Pittsburgh Streets
"Mansion House plan: Being a plan of the subdivision of lots nos. 39 & 40 in the plan of Upper Glenwood, 23rd Ward, Pittsburg." Laid out Mar. 1887; recorded June 23, 1887, Plan Book 7, pp. 304–305. Allegheny County Recorder of Deeds 3779872.
