Of course he did not know, and did not know that he must know.
Mr. Bixby: "My boy, you've got to know the shape of the river, perfectly. It is all there is left to steer by on a very dark night. Everything else is blotted out and gone. But mind you, it hasn't the same shape in the night that it has in the daytime."
"How on earth am I going to learn it, then?"
"How do you follow a hall at home in the dark? Because you know the shape of it. You can't see it."
"Do you mean to say I've got to know all the million trifling variations of the shape of the banks of this interminable river as well as I know the shape of the front hall at home?"
"On my honor you've got to know them better than any man ever did know the shapes of the halls in his own house.... You see, this has got to be learned; there is no getting around it. A clear starlight night throws such heavy shadows that if you didn't know the shape of the shore perfectly, you would claw away from every bunch of timber, because you would take the black shadow of it for a solid cape; and you see you would be getting scared to death every fifteen minutes by the watch. You would be fifty yards from shore all the time when you ought to be within fifty feet of it. You can't see a snag in one of those shadows, but you know exactly where it is, and the shape of the river tells you when you are coming to it. Then there's your pitch-dark night; the river is a very different shape on a pitch-dark night from what it is on a starlight night. All shores seem straight lines then, and mighty dim ones, too; you'd run them for straight lines, only you know better. You boldly drive your boat into what seems to be a solid straight wall (you knowing very well that there is a curve there), and that wall falls back and makes way for you. Then there's your gray mist. You take a night when there's one of those grizzly gray mists, and then there isn't any particular shape to a shore. A gray mist would tangle the head of the oldest man that ever lived. Well, then, different kinds of moonlight change the shape of the river in different ways. You see—"
But the cub had wilted. When he came to his chief reassured him somewhat by replying to his objections:
"No! you only learn the shape of the river; and you learn it with such absolute certainty that you can always steer by the shape. That's in your head, and never mind the one that's before your eyes."
And that was approximately the case. The details of the river, once learned, were so indellibly printed on the mind of the pilot that it seemed as though eyes were almost superfluous. Of course Mr. Bixby stated the extreme case. While the pilot was running a bend "out of his head" in darkness that might be felt, there were always well-known landmarks to be seen—shapes of bluffs so indistinct as to seem but parts of the universal blackness. But these indistinct outlines were enough to confirm the judgment of the man at the wheel in the course he was steering. The man in the hall, in Mr. Bixby's illustration, could not see anything, and didn't know what hall he was in. He might just as well have been blind; and I never heard of a blind man running a steamboat, day or night. In the short experience that I had in the pilot house, I did not reach this perfection; but I have stood on one side of the wheel, mechanically following the orders of my chief, and listening to the churning of the wheel reëchoed from the banks not fifty feet away, when I could scarcely see the jack staff, and could not distinguish between the black of the woods and the all-pervading black of the night.
Mr. Burns or Mr. Cushing would translate the situation, as the boat plowed along under a full head of steam, somewhat like this: "Now we're going down into the bend. Now we're opposite the big cottonwood. Now we must pull out a little, to avoid that nest of snags. Now we will let her begin to come out; the water begins to shoal here; we'll keep away from the point a little, and cross over into the west bend, and follow that down in the opposite direction."