Since there is some record of Captain Montgomery's Company, perhaps someone has information on Captain William Seamans Company, who also lived in Tyler County Texas. William Seamans served originally in the Mt. Hope Guards and was mustered into CSA service on two occassions for defense of Galveston, once in Kirby's (3rd) Battalion.
The only information I have for his service as a Captain is a soldier's pension record, sworn to by witnesses and accepted by the state of Texas. I thought perphaps the Captain Williams Seamans Company was evolved from the Mt. Hope Guards.