This part of the Oberlin letters contains a preface by Oberlin's great, great grandson Allen H. Ryen which traces the provenance of Oberlin's letters. Ryen also includes a transcription of Oberlin's discharge papers which give an account of the battles in
Oberlin, William Penn, "Front Matter" (2019). Indiana, Pennsylvania in the Civil War. 155.
The Historical and Genealogical Society of Indiana County, PA; White Collection