Becky, call Lamar and/or Red River County Clerk. Request a "quickie" lookup in the "marriage index" for your people. The clerks have marriages indexed: "Groom-to-Bride" and the reverse for specific time periods. You can request, for example, "John Brand to unknown female 1874-1910". Depending on size of county, that'll be found in one index. A lookup in the index can be performed in seconds.