CORWIN, Warren C., Capt MC
I am an eBay bookseller and have acquired the book "Military Medical Manual" which has written on the flyleaf "Capt. Warren C. Corwin, MC"."MC" (Medical Corps) is Army for Medical Doctor.
I think, but not sure, I have found him and his wife buried in the National Cemetery in Fayetteville AR.If any of his family reads this and would like to have the book I'll be happy to mail it to them.