T. M. Harris, Assassination of Lincoln: a History of the Great Conspiracy
“ Notwithstanding this fact, I have yet to learn that any loyal man ever challenged, during all the period of our conflict for independence and nationality, the validity of that law for the trial, for military offences, by military tribunals, of all offenders, as the law, not of peace, but of war, and absolutely essential to the prosecution of war. I may be pardoned for saying that it is the accepted common law of nations, that martial law is, at all times and everywhere, essential to the successful prosecution of war, whether it be a civil or a foreign war. ”
