Nobody seems to know the laws that govern the pulse of the big waters. Sometimes even a landsman can tell that the solid ocean is atilt, and that the ship is working herself up a long unseen slope; and sometimes the captain says, when neither full steam nor fair wind justifies the length of a day's run, that the ship is sagging downhill; but how these ups and downs come about has not yet been settled authoritatively. 'No, it is a following sea,' said Frithiof; 'and with a following sea you shall not get good steerage-way.' The sea was as smooth as a duck-pond, except for a regular oily swell. As I looked over the side to see where it might be following us from, the sun rose in a perfectly clear sky and struck the water with its light so sharply that it seemed as though the sea should clang like a burnished gong. The wake of the screw and the little white streak cut by the log-line hanging over the stern were the only marks on the water as far as eye could reach. Keller rolled out of his chair and went aft to get a pineapple from the ripening stock that was hung inside the after awning. 'Frithiof, the log-line has got tired of swimming. It's coming home,' he drawled. 'What?' said Frithiof, his voice jumping several octaves. 'Coming home,' Keller repeated, leaning over the stern. I ran to his side and saw the log-line, which till then had been drawn tense over the stern railing, slacken, loop, and come up off the port quarter. Frithiof called up the speaking tube to the bridge, and the bridge answered, 'Yes, nine knots.' Then Frithiof spoke again, and the answer was, 'What do you want of the skipper?' and Frithiof bellowed, 'Call him up.' By this time Zuyland, Keller, and myself had caught something of Frithiof's excitement, for any emotion on shipboard is most contagious. The captain ran out of his cabin, spoke to Frithiof, looked at the log-line, jumped on the bridge, and in a minute we felt the steamer swing round as Frithiof turned her. ''Going back to Cape Town?' said Keller. Frithiof did not answer, but tore away at the wheel. Then he beckoned us three to help, and we held the wheel down till the _Rathmines_ answered it, and we found ourselves looking into the white of our own wake, with the still oily sea tearing past our bows, though we were not going more than half steam ahead.