Sintz lived in Sangamon County, Illinois, as early as 1833, when he was purchasing federal land along Salt Creek in present-day Broadwell Township of Logan County. Sintz constructed a mill there, and when he was sued by property owners for damages caused by his mill to their land, Sintz retained Stuart & Lincoln to defend him. Sintz died sometime between April 1836 and December 1837, and his administrator Nicholas Moore also retained Stuart & Lincoln to settle the affairs of his estate.
Mortgage of St. Clair Chrisman to Nicholas Sintz; Demint et al. v. Sintz, Martha L. Benner and Cullom Davis et al., eds., Title: The Law Practice of Abraham Lincoln: Complete Documentary Edition, 2d edition (Springfield: Illinois Historic Preservation Agency, 2009), http://www.lawpracticeofabrahamlincoln.org/Details.aspx?case=139853;