The post office closed in 1908. A proposed rail line linking Thornberry to Wichita Falls in Wichita County was never completed and the small town continued to suffer from its remote location. The population was reported as 20 until the 1960s.
The closure of the post office in 1908 and the failure of a railway line connecting Thornberry to Wichita Falls contributed to the town's isolation and slow population growth. The small population, reported as 20 until the 1960s, reflects this isolated existence.