I have the following info from my mother-in-law Jane Keith, local historian.
" Daniel Foust, who was a native of NC, reared his family in Tennessee.Daniel had a Son, John N. Foust who married Susan E. Damewood.John and Susan lived in the Plainville area and had four children; Boston Lafayette, William Charles, Theodore Claude, and Mary Edna. (The last two were deceased prior to 1915.)Boston Lafayette Foust was married twice, first to Anna Heinbaugh who bore him 1 child Ralph (deceased by 1915), and his second marriage was to Nora Standley, who bore him 4 children; Cleo, Standley, Lyman, & Juanita.B. L. lived in Plainville and was in the dry goods business.Besides owning a farm 1/2 north of Plainville, William Charles (known as Charles) owned a store building in Plainville, Lot 99.It's possible that B. L. & Charles were in business together since they were brothers, and they were both said to have been in the "dry goods" business.This information was found in the Daviess Co. history by A. O. Fulkerson on pages 414-415, published in 1915."
The farm mentioned in Jane's text, the home of Charles Foust, currently belongs to Carl & Sheila Wade, owners of the Iron Kettle restaurant in Plainville.The origional house had burned down, and was rebuilt about 75 years ago.There are two other known "Foust properties" in the Plainville area.
I remember having a Lyman Foust as my grade school Art teacher during the 60's.I don't know if he was the same Lyman that was mentioned in Jane's info, which is Boston's son, or if he was possibly a grandson of Boston.
This is all that I have, I hope some of it was helpful, and not a repeat of your own previous efforts.