The story of the derivation of the famous _nom de guerre_ has often been narrated-and as often erroneously. As the steamboat approaches a sandbank, snag, or other obstruction, the man at the bow heaves the lead and sings out, “By the mark, three,” “Mark twain,” etc.-meaning three fathoms deep, two fathoms, and so on. The thought of adopting Mark Twain as a _nom de guerre_ was not original with Clemens; but the world owes him a debt of gratitude for making forever famous a name that, but for him, would have been forever lost. “There was a man, Captain Isaiah Sellers, who furnished river news for the New Orleans Picayune, still one of the best papers in the South,” Mr. Clemens once confessed to Professor Wm. L. Phelps. “He used to sign his articles Mark Twain. He died in 1863. I liked the name, and stole it. I think I have done him no wrong, for I seem to have made this name somewhat generally known.” The inglorious escapade of his military career, at which he himself has poked unspeakable fun, and for which not even his most enthusiastic biographers have any excuse, was soon ended. Had his heart really been enlisted on the side of the South, he would doubtless have stayed at his post. In reality, he was at that time lacking in conviction; and in after life he became a thorough Unionist and Abolitionist. In the summer of 1861, Governor Jackson of Missouri called for fifty thousand volunteers to drive out the Union forces. While visiting in the small town where his boyhood had been spent, Hannibal, Marion County, young Clemens and some of his friends met together in a secret place one night, and formed themselves into a military company. The spirited but untrained Tom Lyman was made captain; and in lieu of a first lieutenant --strange omission!--young Clemens was made second lieutenant. These fifteen hardy souls proudly dubbed themselves the Marion Rangers. No one thought of finding fault with such a name--it sounded too well. All were full of notions as high-flown as the name of their company. One of their number, named Dunlap, was ashamed of his name, because it had a plebeian sound to his ear. So he solved the difficulty and gratified his aristocratic ambitions by writing it d'Unlap. This may serve as a sample of the stuff of which the company was made. Dunlap was by no means useless; for he invented hifalutin names for the camps, and generally succeeded in proposing a name that was, as his companions agreed, “no slouch.”