David, there are many galvanized Yankees that have tombstones in the State of Mississippi. If you would pull his pension records at NARA in DC it might even have a photograph of him when he or he wife; if he were married applied for a pension if either one of them lived long enough. I've run across a so-called galvanized Yankee within the 1st New Orleans and that unit is sort of complicated as it changed names as I recall and I think it turned into the 2nd New Orleans Infantry. I say so-called because he was really a Union soldier to start with but claimed to be a Confederate soldier while at the Fort Delaware Prison. He deserted twice while in the United States Army and ironically even received a Union Pension! Interestingly an article is coming out in February 2019 in the magazine put out by the Fort Delaware Society that I wrote that goes into detail about his military life. He made a mockery out of the Union pensions office and had deserted as a Union soldier at Gettysburg and prior to Gettysburg had several desertions in the Union Army. He changed his name at Fort Delaware claiming to be in a Confederate unit from Mississippi but the Confederate unit was a thousand miles away from Gettysburg. Hugh Simmons is the editor of the magazine. He enlisted in the 3rd Maryland Cavalry as a so-called Confederate and then deserted the 3rd Maryland Cavalry and enlisted as his real name in the 1st New Orleans Infantry and then deserted them and came back to the 3rd Maryland Cavalry under his false name under the conditions of President Lincoln Proclamation of Union deserters issued in 1865. The Union pensions office failed to connect the dots as being a real Union soldier to start with. And he was not the only Union soldier who had deserted the Union Army and claimed to be a Confederate and then deserted the Union Army again and received a United States pension. It's a fascinating off the wall subject. Had it not been for the Union pension records at the NARA in DC I could never have proved his case. Your soldier is rather simple as he really was a former Confederate soldier who became a true galvanized Yankee.