I clicked on the 2nd link and it worked fine for me. Not certain if you had trouble with the link, or if you didn't understand what info I was attempting to provide to you. You had inquired about the location and info on Jackson Township. On the google books page for the 1882 History of Daviess County, you can read a very good description of the location of Jackson Township, as well as you have access to the entire manuscript. While I did not find a direct reference to Fountain Terrill, it did provide some wonderful information to narrow down your search of the county.
It is wonderful you made it to Lock Springs, I'd say you are on the right trail. Enjoy the journey!