Frank M. Old, Jr. was born in Pittsburgh but later in life moved to Michigan. He is listed in the 1900 U.S. census living with his dad, mother, and siblings in Pittsburgh, PA. Frank M. Old, Jr. fathered two children, Frank S. Old & James J. Old.
The Mary Old document is interesting in that she is listed from the same Ward as her family in the 1850 U.S. Census: Ward 3, Allegheny county, Pittsburgh, Pennsylvania. The map of Ward 3 shows how small Ward 3 was in 1850. Until we find Mary Lee's birth, marriage, & death records it's hard to prove this is our Mary Lee, wife of James Old. If she was born in the same year of James Old, 1818, then the dates match. I believe this is our Mary Lee, but I cannot prove it, yet!!