Racksole laughed. ‘Can you get off this afternoon?’ he asked.

‘Certainly,’ said Hazell; ‘I’ll get one of my pals to sign on for me, and then I shall be free.’

‘Well,’ said Racksole, ‘I should like you to come down with me to the Grand Babylon. Then we can talk over my little affair at length. And may we go on your boat? I want to meet your crew.’

‘That will be all right,’ Hazell remarked. ‘My two men are the idlest, most soul-less chaps you ever saw. They eat too much, and they have an enormous appetite for beer; but they know the river, and they know their business, and they will do anything within the fair game if they are paid for it, and aren’t asked to hurry.’

That night, just after dark, Theodore Racksole embarked with his new friend George Hazell in one of the black-painted Customs wherries, manned by a crew of two men—both the later freemen of the river, a distinction which carries with it certain privileges unfamiliar to the mere landsman. It was a cloudy and oppressive evening, not a star showing to illumine the slow tide, now just past its flood. The vast forms of steamers at anchor—chiefly those of the General Steam Navigation and the Aberdeen Line—heaved themselves high out of the water, straining sluggishly at their mooring buoys. On either side the naked walls of warehouses rose like grey precipices from the stream, holding forth quaint arms of steam-cranes. To the west the Tower Bridge spanned the river with its formidable arch, and above that its suspended footpath—a hundred and fifty feet from earth.

Down towards the east and the Pool of London a forest of funnels and masts was dimly outlined against the sinister sky. Huge barges, each steered by a single man at the end of a pair of giant oars, lumbered and swirled down-stream at all angles. Occasionally a tug snorted busily past, flashing its red and green signals and dragging an unwieldy tail of barges in its wake. Then a Margate passenger steamer, its electric lights gleaming from every porthole, swerved round to anchor, with its load of two thousand fatigued excursionists. Over everything brooded an air of mystery—a spirit and feeling of strangeness, remoteness, and the inexplicable. As the broad flat little boat bobbed its way under the shadow of enormous hulks, beneath stretched hawsers, and past buoys covered with green slime, Racksole could scarcely believe that he was in the very heart of London—the most prosaic city in the world. He had a queer idea that almost anything might happen in this seeming waste of waters at this weird hour of ten o’clock. It appeared incredible to him that only a mile or two away people were sitting in theatres applauding farces, and that at Cannon Street Station, a few yards off, other people were calmly taking the train to various highly respectable suburbs whose names he was gradually learning. He had the uplifting sensation of being in another world which comes to us sometimes amid surroundings violently different from our usual surroundings. The most ordinary noises—of men calling, of a chain running through a slot, of a distant siren—translated themselves to his ears into terrible and haunting sounds, full of portentous significance. He looked over the side of the boat into the brown water, and asked himself what frightful secrets lay hidden in its depth. Then he put his hand into his hip-pocket and touched the stock of his Colt revolver—that familiar substance comforted him.

The oarsmen had instructions to drop slowly down to the Pool, as the wide reach below the Tower is called. These two men had not been previously informed of the precise object of the expedition, but now that they were safely afloat Hazell judged it expedient to give them some notion of it. ‘We expect to come across a rather suspicious steam launch,’ he said. ‘My friend here is very anxious to get a sight of her, and until he has seen her nothing definite can be done.’

‘What sort of a craft is she, sir?’ asked the stroke oar, a fat-faced man who seemed absolutely incapable of any serious exertion.

‘I don’t know,’ Racksole replied; ‘but as near as I can judge, she’s about sixty feet in length, and painted black. I fancy I shall recognize her when I see her.’

‘Not much to go by, that,’ exclaimed the other man curtly. But he said no more. He, as well as his mate, had received from Theodore Racksole one English sovereign as a kind of preliminary fee, and an English sovereign will do a lot towards silencing the natural sarcastic tendencies and free speech of a Thames waterman.