I love it. Thanks for the prompt "gift". I will be very happy to receive more.
I had done searches on the Library of Congress for pics of Pennsylvania regiments, but found just a few, and I couldn't spot any 1841 Mississippi. I sort of gave up on the hope of finding such pictures, but you have brought new hope.
Where did you find this? Do you know the date of the picture, or the name of the soldier? It's not a Pennsylvania Regiment, but dated pictures help give a sense of the type of regiments that used the Mississippi (e.g. front line units vs stae militia/homeguard type units).