"A good deal of your life on the Mississippi is autobiographical, isn't it?" I asked.

"As near as it can be—when a man is writing to a book and about himself. But in genuine autobiography, I believe it is impossible for a man to tell the truth about himself or to avoid impressing the reader with the truth about himself.

"I made an experiment once. I got a friend of mine—a man painfully given to speak the truth on all occasions—a man who wouldn't dream of telling a lie—and I made him write his autobiography for his own amusement and mine. He did it. The manuscript would have made an octavo volume, but—good, honest man that he was—in every single detail of his life that I knew about he turned out, on paper, a formidable liar. He could not help himself.

"It is not in human nature to write the truth about itself. None the less the reader gets a general impression from an autobiography whether the man is a fraud or a good man. The reader can't give his reasons any more than a man can explain why a woman struck him as being lovely when he doesn't remember her hair, eyes, teeth, or figure. And the impression that the reader gets is a correct one."

"Do you ever intend to write an autobiography?"

"If I do, it will be as other men have done—with the most earnest desire to make myself out to be the better man in every little business that has been to my discredit; and I shall fail, like the others, to make my readers believe anything except the truth."

This naturally led to a discussion on conscience. Then said Mark Twain, and his words are mighty and to be remembered:—

"Your conscience is a nuisance. A conscience is like a child. If you pet it and play with it and let it have everything that it wants, it becomes spoiled and intrudes on all your amusements and most of your griefs. Treat your conscience as you would treat anything else. When it is rebellious, spank it—be severe with it, argue with it, prevent it from coming to play with you at all hours, and you will secure a good conscience; that is to say, a properly trained one. A spoiled one simply destroys all the pleasure in life. I think I have reduced mine to order. At least, I haven't heard from it for some time. Perhaps I have killed it from over-severity. It's wrong to kill a child, but, in spite of all I have said, a conscience differs from a child in many ways. Perhaps it's best when it's dead."

Here he told me a little—such things as a man may tell a stranger—of his early life and upbringing, and in what manner he had been influenced for good by the example of his parents. He spoke always through his eyes, a light under the heavy eyebrows; anon crossing the room with a step as light as a girl's, to show me some book or other; then resuming his walk up and down the room, puffing at the cob pipe. I would have given much for nerve enough to demand the gift of that pipe—value, five cents when new. I understood why certain savage tribes ardently desired the liver of brave men slain in combat. That pipe would have given me, perhaps, a hint of his keen insight into the souls of men. But he never laid it aside within stealing reach.

Once, indeed, he put his hand on my shoulder. It was an investiture of the Star of India, blue silk, trumpets, and diamond-studded jewel, all complete. If hereafter, in the changes and chances of this mortal life, I fall to cureless ruin, I will tell the superintendent of the workhouse that Mark Twain once put his hand on my shoulder; and he shall give me a room to myself and a double allowance of paupers' tobacco.