I did quite a few years research on the Alt/Ault family of Loudoun Co. and what I have is Maria Anna Alt b. June 12, 1816, Loudoun Co. Va, bapt. Dec 15, 1816 Lovettsville, Loudoun Co. VA, parents Johann Wilhelm Alt & Susanna Ulm. This Johann Wilhelm was William Ault on the census records. He married #1 Susanna Ulm Aug 20, 1815 Loudoun Co. VA and #2 widow Nancy Thomas ca Aug 1836 Loudoun Co. I have Mary Ann Ault married Stephen Downs March 24, 1846. Mary's brother was Johannes/John Alt/Ault b. Jan 28, 1818, bapt. Mar 28, 1818 Lovettsville, Loudoun Co. VA. I thought the boys Stephen & William Downs shown living with John and Mahala Ault on the census, were probably sons of Mary & Stephen Downs.