Sources for Mary A :

1. 1910 United States Federal Census, Database online. Pittsburgh Ward 10, Allegheny, Pennsylvania, ED , roll T624_1302, part , page .Record for John Schworz
2. 1930 United States Federal Census, Database online. Pittsburgh, Allegheny, Pennsylvania, ED 158, roll 1974, page , image 83.0.Record for John Schwarz