My Gr Great Uncle Luke L Watson was also captured on March 12 1863 in Dunklin Co. and went to the same prisons as Wesley Faulkner, ending in Alton.
I found 16 pages of info at Footnote.com. in the end he wouldn’t sign the oath, But it said he was paroled April 28th 1863 and sent for prisoner exchange.
Which was common for low ranked solders.