There doesn't seem to be a Kelly in the
Carbon Co. Cem. book that matches precisely to yours. A "J" Kelly died 17 Aug 1924 (b. 13 Aug 1854) and a John Thomas is listed as 1883 - 1944, next to Nellie E., Ed
ThurstonIn those early years (1919 could still be part of the big flu epidemic), there were many with unmarked graves. Not all deaths were recorded in the county, either. You might try writing to the Co. courthouse (address is on Co. MTGenWeb site) to see if they have a death record.
Corky