Custer County Probate index listed Mann, Jas. B. 1-27-1904 case # 48.
Check with the Weatherford Custer County Western Plains Genealogy Society at- PO Box 1672, Weatherford OK 73096
The courthouse records were microfilmed & they might be able to get you a copy for a small lookup fee & cost of copies- some of these probate papers have alot of pages & others have just a few so it depends on how many there are & how long it takes to copy them. Send them a SASE & your info & this case # & dates & that will help them locate them. Happy Trails on your searching, Kim Dresser