Source:Rs-cassatt-addl-plan
From Pittsburgh Streets
"An additional plan of lots in and adjoining the 3rd Ward Allegheny: Comprising part of out lot № 148 and part of the high rough land in the Reserve Tract Opp. Pittsburgh: Laid out for R. S. Cassatt." Laid out Oct. 30, 1847; recorded Nov. 16, 1847, Plan Book 1, p. 129. Allegheny County Recorder of Deeds 3778227.
