I began with that first red bar, and without ulterior design, or plan of any sort--just as I would begin a Prince and Pauper, or any other tale. And mind you it is the easiest and surest way; because if you invent two or three people and turn them loose in your manuscript, something is bound to happen to them--you can’t help it; and then it will take you the rest of the book to get them out of the natural consequences of that occurrence, and so, first thing you know, there’s your book all finished up and never cost you an idea. Well, the red stripe, with a bias stitch, naturally suggested a blue one with a perpendicular stitch, and I slammed it in, though when it came daylight I saw it was green--which didn’t make any difference, because green and blue are much the same, anyway, and in fact from a purely moral point of view are regarded by the best authorities as identical. Well, if you will notice, a blue perpendicular stitch always suggests a ropy red involved stitch, like a family of angle-worms trying to climb in under each other to keep warm--it would suggest that, every time, without the author of the slipper ever having to think about it at all. Now at that point, young Dr. Root came in, and, of course, he was interested in the slipper right away, because he has always had a passion for art himself, but has never had a chance to try, because his folks are opposed to it and superstitious about it, and have done all they could to keep him back; and so he was eager to take a hand and see what he could do. And it was beautiful to see him sit there and tell Mrs. Clemens what had been happening while we were off on summer vacation, and hold the slipper up toward the end of his nose, and forget the sordid world, and imagine the canvas was a “subject” with a scalp wound, and nimbly whirl in that lovely surgical stitch which you see there--and never hesitating a moment in his talk except to say “Ouch” when he stuck himself, and then going right on again as smooth and easy as nothing. Yes, it was a charming spectacle. And it was real art, too--realistic, just native untaught genius; you can see the very scalp itself, showing through between the stitches. Well, next I threw in that sheaf of green rods which the lictors used to carry before the Roman consuls to lick them with when they didn’t behave--they turned blue in the morning, but that is the way green always acts. The next week, after a good rest, I snowed in that sea of frothy waves, and set that yellow thing afloat in it and those two things that are skewered through it. It isn’t a home plate, and it isn’t a papal tiara with the keys of St. Peter; no, it is a heart--my heart--with two arrows stuck through it--arrows that go in blue and come out crimson--crimson with the best drops in that heart, and gladly shed for love of you, dear.