Kirby I've stumbled across references to Purcell's Sharpshooter Rangers on service records of Audrain Co vets. There also is a bump into Co D Perkin's Battalion. Very fluid it appears.

PURCELL, Capt. Young , a farmer living on Littleby, organized a company, which was part of the time with Porter and at other times operating as bush-whackers. Aug. 13, 1862, he and a company of 200 men entered Columbia and liberated the Confederate prisoners there in jail, one of whom was Wm. R. Jackson, son of Judge James Jackson of pioneer days of Audrain. Buried near Montevallo, Vernon Co. History of NE Mo. by Williams Vol I pgs 218 & 219.

I've not found a death or burial reference other than this one.