Are you certain the marriage took place in Upshur? Geography often determined the issuance of marriage licenses. Since marriages were/are not restricted to county of residence, people obtained license from the nearest county seat. Typically, people living in Hughes Springs (Cass County) obtained license from Daingerfield (Morris County). That's sensible 'cause Cass County Seat at Linden is approximately 15 distant while Daingerfield is only five miles from Hughes Springs. If you know where they resided, check a map to see if a neighboring county seat was closer than Gilmer. Too, if the bride resided in another county, the marriage may have been performed in the home of her parents/relatives?