walkitout | That's what I think currently as well (Reply)

From:

Ironically, this is a more recent generation of the same family that you helped me find Huntington for in modern day New Jersey (turned out to be Pohatcong).

I've found (in ancestry.com) a copy of H.F. Andrews' history of Audubon County. I also found land records (ancestry.com) for Nathaniel Hamlin, definitely for Audubon County and I thought I found one for Mahaska as well. The Mahaska land was supposedly transferred to Nathaniel from one of his uncles, according to Andrews -- but I don't know which one. So I'll be poking around for a while here.

ETA: Andrews says that William was born in Lewis County, Kentucky, and built a cabin in Salt Lick and later a more pretentious dwelling. He does not indicate whether he was born in Salt Lick or elsewhere. *shrug*