My GG Uncle Wesley W. Myers was in and out of the Jefferson Barracks Hosp. between 1861 and 1864. His Company muster roll cards indicate he was disabled but no details. He was in Company C, 15th Regiment of the Iowa Infantry. My question is, how do I get what information the Jefferson Barracks Hospital may have on him? I am doing a family tree and looking for all the info I can get.

Thanks