I'm not familiar with Henderson, TX but that doesn't mean much. I don't have a lot of information on the Montgomery line. Here's the basics, maybe we could find a connection?!
My great grandfather was Oda Theodore Montgomery. He was born in Tennessee in 1893 and died in 1927 in San Antonio, Bexar Co., Texas. He was one of 6 children. My gg grandfather, Theodore Jonas Montgomery, who was born in Kentucky 1853 & died in Texas during a hurricane/flood in 1919. He was one of 3 children. I know his fathers name, August Montgomery and that he supposedly died in 1865 (location unknown). Beyond that I know nothing.