There was a female M. WALLACE in the 1840 Mercer Co Census Mahoning Township on Page 323. She was 90-100.She lived next door to her son Wm. Wallace. She had a female 60-70 living with her. In 1830 she was listed as living with William Wallace and his family. Can anyone tell me anything about this lady. When did she die? I think she was the wife of Hugh Wallace buried at Plain Grove. He died 1820 at the age of 78 (born 1742) Dorothea Wallace Silbert