Although his pay varies according to whether the tributaries of the river are full or low, so making the moving of the logs easy or difficult, he can earn about three pounds ten shillings a month, paid in cash. Compared with the eighty cents a month paid only a few miles away in the Congo Free State, and in "trade" goods, these are good wages. When the log is shaped the mark of the trader is branded on it with an iron, just as we brand cattle, and it is turned loose on the river. At the mouth of the river there is little danger of the log escaping, for the waves are stronger than the tide, and drive the logs upon the shore. There, in the surf, we found these tons of mahogany pounding against each other. In the ship's steam-launch were iron chains, a hundred yards long, to which, at intervals, were fastened "dogs," or spikes. These spikes were driven into the end of a log, the brand upon the log was noted by the captain and trader, and the logs, chained together like the vertebræ of a great sea serpent, were towed to the ship's side. There they were made fast, and three Kroo boys knocked the spike out of each log, warped a chain around it, and made fast that chain to the steel hawser of the winch. As it was drawn to the deck a Senegalese soldier, acting for the Customs, gave it a second blow with a branding hammer, and, thundering and smashing, it swung into the hold. [Illustration: There, in the Surf, We Found These Tons of Mahogany, Pounding Against Each Other.] In the "round up" of the logs the star performers were the three Kroo boys at the ship's side. For days, in fascinated horror, the six passengers watched them, prayed for them, and made bets as to which would be the first to die. One understands that a Kroo boy is as much at home in the sea as on shore, but these boys were neither in the sea nor on shore. They were balancing themselves on blocks of slippery wood that weighed a ton, but which were hurled about by the great waves as though they were life-belts. All night the hammering of the logs made the ship echo like a monster drum, and all day without an instant's pause each log reared and pitched, spun like a barrel, dived like a porpoise, or, broadside, battered itself against the iron plates. But, no matter what tricks it played, a Kroo boy rode it as easily as though it were a horse in a merry-go-round. It was a wonderful exhibition. It furnished all the thrills that one gets when watching a cowboy on a bucking bronco, or a trained seal. Again and again a log, in wicked conspiracy with another log, would plan to entice a Kroo boy between them, and smash him. At the sight the passengers would shriek a warning, the boy would dive between the logs, and a mass of twelve hundred pounds of mahogany would crash against a mass weighing fifteen hundred with a report like colliding freight cars.