Shilo Battle Information

[sharpsrifles]

Hello,
I am new to this, but I hope this is the appropriate place to ask this question.
The question is, I have a Sharps Pistol Rifle, that has a poem carved inside the forearm. The poem reads, " I thank'd the yanks for this gun, for with it the battle was won, when I shot that Major on the run. SGT. Collins, 3rd Miss. 1862."
I have been told by the historian at the Shilo Battle Park, that it could have been several different Majors. I have found a Corporal Collins that was in the Tippah Highlanders, which was part of the 3rd Mississippi, Hardcastles.
I have had the poem looked at by an authority on Sharps and other antiques. He believes the poem is probably period. It was under a fair amount of gun powder residue. I found it when I was looking for matching serial #'s.
If anyone has a thought or possibility I would appreciate the info.
I think it may be possible it was Major Stone, and the rifle was taken when the Confederate troops went through the union camps, April 6th.
Thanks,
Bill & Vicki