Seeking assistance please.

Robert J.(ames) Martin
b. ca. 1832, AL
m. 1st Belinda Ellison, 27 Oct. 1853, Madison Co., MS

Served CSA
Co. F, 18th MS Inf., Pvt/Captain

Believed to be listed on 1880 U. S. Census, Sebastian Co., Arkansas as:
James Martin, age 45, b. AL
with a 2nd (?)wife, Hettie, age 40, b. AL
and family.

Seek to know anything regarding a possible pension he or his wife might have filed for his CSA service.

Would also love to know where he is buried

Any assistance appreciated!

Thanks!

Margaret