During the American Civil War, captured Union soldiers held in Libby Prison, Richmond, Va., were allowed only six lines in correspondence with their friends at home. Here’s a sample letter:

“My Dear Wife. – Yours received – no hopes of exchange – send corn starch – want socks – no money – rheumatism in left shoulder – pickles very good – send sausages – God bless you – kiss the baby – Hail Columbia! – Your devoted husband.”