(This is the third installment of a three-part series about Charlie Tinker.) It is the summer of 1865 and, according to Charlie Tinker’s diaries, it has been a summer of oppressive heat. Its airless steaminess made more miserable by the heavy sorrow he and his colleagues have shouldered since the death of their commander-in-chief, Abraham Lincoln. Lincoln made several visits daily to the telegraph office where Charlie and three others deciphered frequent dispatches from the Civil War battlefields.