As an Australian, I know little of these things.
Robert emigrated from Cornwall to Texas in 1834, probably participated in the 1836 Texas Revolution, was captured by the Mexicans at Mier in 1842, survived the Black Bean Episode, became a successful farmer, and then died of dysentery after capture whilst serving in the 24th Battalion, Texas Infantry State Troops in 1864.
Have I categorised him properly? I've probably missed something.
Thanks.
Edit: I've added the black_heritage tag, because Robert appears to own five enslaved persons by 1860.