The pilot shook his head. "That depends on wind, water, and th' strength of th' current, though th' last don't make very much difference sometimes."

Tom looked up inquiringly. "I don't just understand th' last part," he confessed. "Mebby I didn't hear it right."

"Yes, you did," replied the pilot, grinning in the darkness. "When she's high she's swift; but she's also a hull lot straighter. Th' bends of this river are famous, an' they add a lot of miles to her length. They also cut down th' slant of her surface, which cuts down th' strength of th' current. At lower water we'd have a longer distance to sail, but a gentler current. When she rises like she is now she cuts off, over or behind a lot of th' bends an' makes herself a straighter road. An' th' shorter she gits, th' steeper her pitch grows, which makes a stronger current. She jest reg'lates herself accordin' to her needs, an' she gits shet of her floods about as quick as any river on earth. Oh, I tell you, she's a cute one; an' a mean one, too!"

"She's shore movin' fast enough now," observed Tom, watching the hurtling driftwood going spectrally down the almost luminous surface. "How long will this high water last, anyhow?"

"Considerable less than th' June rise," answered the pilot. "She's fallin' now, which is one of th' reasons we're tied to th' bank instid of goin' on all night. This here rise is short, but meaner than sin. Th' June rise is slower an' not so bad, though it lasts longer. It comes from th' rains an' meltin' snow in th' mountains up above. Down here th' current ain't as swift as it is further up, for this slope is somethin' less than a foot to th' mile; but if it warn't for th' big bottoms, that let some of th' water wander around awhile instid of crowdin' along all at once, we'd have a current that'd surprise you. Jest now I figger she's steppin' along about seven miles an hour. Durin' low water it's some'rs around two; but I've seen it nearer ten on some rises. There are places where steamboats can't beat th' current an' have to kedge up or wait for lower water. About gittin' to Independence Landin', or what's left of it, I'll tell you that when we pass Liberty Landin'. Miles through th' water ain't miles over th' bottom, an' it's th' last that counts. Besides, th' weather has got a lot to say about our business. I hope you ain't gittin' chilled, Miss Cooper, this spring air cuts in amazin' after sundown."

"I am beginning to feel it," she replied, arising, "I'll say good night, I believe, and 'turn in.'"

Tom escorted her to the lower deck and watched her cross the cabin and enter her room, for he had no illusions about some of the men on board. As her door closed he wheeled and went to look at the engines, which were connected directly to the huge paddle wheel. The engineer was getting ready to climb into his bunk, but he smoked a pipe with his visitor and chatted for a few minutes. Tom knew what it meant to be an engineer on a Missouri river packet and he did not stay long. He knew that his host scarcely took his hand from the throttle for a moment while the boat was moving, for he had to be ready to check her instantly and send her full speed astern. The over-worked system of communication between the pilot house and the engine room had received its share of his attention during his runs on the river.

He next went forward along the main deck and looked at the boilers, the heat from them distinctly pleasing. As he turned away he heard and felt the impact from another great, trimmed log slipping along the faint, gray highway. Some careless woodcutter upstream had worked in vain. He stopped against the rail and looked at the scurrying water only a few feet below him, listening to its swishing, burbling complaints as it eddied along the hull, seeming in the darkness to have a speed incredible. A huge cottonwood with its upflung branches and sunken roots paused momentarily as it struck a shallow spot, shivered, lost a snapping dead limb, collected a surprising amount of débris as it swung slowly around and tore free from the clutching mud of the bottom and, once more acquiring momentum, shot out of sight into the night, its slowly rising branches telling of the heavy roots sinking to their proper depth. Next came a tree stump like some huge squid, which must have been well dried out and not in the water for very long, else it would have found the bottom before this. Then a broken and waterlogged keelboat, fully twenty-five feet long, scurried past, a great menace to every boat afloat. Planks, rails from some pasture fence, a lean-to outhouse, badly smashed, and a great mass of reeds and brush came along like a floating island. The constantly changing procession and the gray water fascinated him and he fairly had to tear himself away from it. Strange splashings along the bank told him of undermined portions of it tumbling into the river, and a louder splash marked the falling of some tree not far above.

"She's talkin' a-plenty tonight," said a rough voice behind him and he turned, barely able to make out a figure dressed much the same as he was; but he did not see another figure, in Mexican garb, standing in the blackness against a partition and watching him. The speaker continued. "More gentle, this hyar trip; ye should 'a' heard her pow-wowin' th' last run up. I say she's wicked an' cruel as airy Injun; an' nothin' stops her."

"I can't hardly keep away from her," replied Tom, easily dropping into the language of the other; "but I ain't likin' her a hull lot. A hard trail suits me better."