You are showing him as being born about 1773-1776 on the 1830 census? But you did not say who his father was? Is this birth date from some other source. Otherwise, the dates do not calculate out. If he died in 1867, he would have been 94 years old. Maybe you have another William MILLS in the same area that you picked up thinking it was the same one? Can you clarify? Thank you Pat cw