Download or read book Lieutenant Colonel Ole C. Johnson, Libby Prison, Richmond, Virginia, Letter to Brother John A. Johnson written by Ole C. Johnson and published by . This book was released on 1864 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Letter, dated Libby Prison, Richmond, Virginia, February 1 1864?, from Lieutenant Colonel Johnson, 15th Wisconsin Volunteer Infantry Regiment, to his brother, John A. Johnson; written in "invisible ink" (probably onion juice) which could be seen only when heated, perhaps in an attempt to pass Confederate censorship.