I'm looking for a Census that list all family members names dated 1790-1820 for the Prince George County, Maryland. Matilda M. Willis was my 2nd great grandmother, she was married to a William R. Willis of Maryland, possibly born in 1794. I believe William was the brother of a Henry Willis who was born in 1807 in Maryland. Henry was married to Elizabeth (Hanson ??) they lived in Maryland. In 1850 he lived in Vansville, in 1860 he lived in Hyattsvill and in 1870 he lived in Laurel. Henry was a farmer all of his life. Any information on Henry or William Willis would be very much appreciated.