In December 1784, Peter married Susannah Anderson of Cumberland County, Virginia. She was the daughter of Captain James Anderson and his wife Elizabeth Tyler Baker Anderson. The Andersons were of social distinction and owned a plantation called "The Mansion." Peter and Susannah had two children: a son, James Anderson, born in the log house in 1786; and a daughter, Polly, born in 1788. Peter sold the 250 acres on Louse Creek in 1788. His wife Susannah died in 1790.  
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