Lookup W S "Caldwill" in 1940 Tarrant County. His family occupied the home but uncertain he was responsible for construction. He's correctly identified as: William S. Caldwell (10 Oct 1894 - 3 Jan 1945) who died in Dallas V A Hospital. On 1930 Tarrant-Fort Worth-District 86-Image 9, the house numbering enumerated 1420 with 1439 next. Therefore it may have been finished after the census? At least two carpenters lived on Gambrell in 1940 so either/both may have contributed?