I apologize for my late response to your email. My life got pretty busy and I stopped digging into the family history until now. Thank you for sharing the information on Thomas Marshall.
Does the Portrait & Biographical Record, Fountain, Montgomery & Parke Counties book have any references to the following?:
Jonathan S. Marshall (born 23 April 1845)
Alfred James Marshall (born 13 Aug 1868)
Elvin B. Marshall (born 17 Jan 1896)
Thank you again,
Bradford Marshall Fields