I used my web site and the S&S system (which doesn't work like it used to, somethings work with it) plus ancestry.com. I had done research into Yerger's regiment before and noticed seeing the same men in it from Barnes' Company about a year ago. I probably was seeing S. J. Harper back then and forgot about it because I was focused on Barnes. What I did was to compare the names from men of the 39th, with the names of men from Barnes Company, and Yerger's. The names I remember matched were Hoggs, Thames, Harper, Barnes and one other but the power outage yesterday killed my search for the day!
David