I'm researching my 3x grandfather James William Smith. He has the following on his gravestone:
James w. Smith
Member of Capt. M. J. Beckett's Co.
G. 41st Miss.Infantry
Killed in Battle Oct. 24, 1863
Age 20 yrs. 2 mos.

And his brothers gravestone:

John T. Smith, member of Captain Lumsden's Artillery Died in Columbia, MS 6-8-1862

Thank you for any information you may have.