1830 Morgan Co IL Census: Wm. I. Masters on p.67, age 20-30, 2m -5, 2f -5, 1f 20-30. Enumerated near Isaac R. Bennett and Arche Poindexter, brothers.-in-law.
Family Group Sheet done by Marlene Jones shows that William Masters married 2nd, Millie Parrot. Children by Nancy Jones were Samuel, John B. who married Nancy Sims in 1847, Betsy Ann, Melissa Ann who married Granderson Smith, and Phoebe Ann who married Peter Davenport.
Indiana Marriage Database Online:
The 1850, Morgan Co IL census does show Peter Davenport, age 23, with wife Phoebe age 17 and a one-year-old Elizabeth. Malissa Masters, age 22, was living with them. Only a couple of pages away there are several young Masters children living with a Boyer family. Could these be children of Masters 2nd marriage? They are William age 14, Jilbert & Albert age 10, and Emily age 8. The Boyers are Jacob age 32 and Milly, age 23 [could this Milly be a daughter of Millie Parrott by a previous marriage?]
Nancy Jane JONES and William Irwin MASTERS had the following children: