I have reached out to Wayne Motts of the Adams County Historical Society and Bill Copeley of the New Hampshire Historical Society for help with this project. Motts would be a help for obvious reasons, but Copeley has possession of the John Bachelder Papers. Bachelder (1825-94), was appointed by Congress the official historian of the Battle of Gettysburg. These writings contain a great deal of material that would be very helpful on my search, including many writings from James Wallace, the Dickinson grad and Colonel of the 1st Maryland Regiment, USA.
Unfortunately, neither of these individuals have been able to respond to my inquiries. I do remain hopeful, however, that these contacts will eventually pay off.