them when they came down."
"Which would have been never. This man Small is a pretty shrewd fellow. He would send a scout on ahead, and if anything made him suspicious he would lie snug for another week."
"But you might have stuck to Mordecai Smith, and so been led to their hiding-place," said I.
"In that case I should have wasted my day. I think that it is a hundred to one against Smith knowing where they live. As long as he has liquor and good pay, why should he ask questions? They send him messages what to do. No, I thought over every possible course, and this is the best."
While this conversation had been proceeding, we had been shooting the long series of bridges which span the Thames. As we passed the City the last rays of the sun were gilding the cross upon the summit of St. Paul's. It was twilight before we reached the Tower.
"That is Jacobson's Yard," said Holmes, pointing to a bristle of masts and rigging on the Surrey side. "Cruise gently up and down here under cover of this string of lighters." He took a pair of night-glasses from his pocket and gazed some time at the shore. "I see my sentry at his post," he remarked, "but no sign of a handkerchief."
"Suppose we go downstream a short way and lie in wait for them," said Jones eagerly.
We were all eager by this time, even the policemen and stokers, who had a very vague idea of what was going forward.
"We have no right to take anything for granted," Holmes answered. "It is certainly ten to one that they go downstream, but we cannot be certain. From this point we can see the entrance of the yard, and they can hardly see us. It will be a clear night and plenty of light. We must stay where we are. See how the folk swarm over yonder in the gaslight."
"They are coming from work in the yard."
"Dirty-looking rascals, but I suppose every one has some little immortal spark concealed about him. You would not think it, to look at them. There is no a priori probability about it. A strange enigma is man!"
"Someone calls him a soul concealed in an animal," I suggested.
"Winwood Reade is good upon the subject," said Holmes. "He remarks that, while the individual man is an insoluble puzzle, in the aggregate he becomes a mathematical certainty. You can, for example, never foretell what any one man will do, but you can say with precision what an average number will be up to. Individuals vary, but percentages remain constant. So says the statistician. But do I see a handkerchief? Surely there is a white flutter over yonder."
"Yes, it is your boy," I cried. "I can see him plainly."
"And there is the Aurora," exclaimed Holmes, "and going like the devil! Full speed ahead, engineer. Make after that launch with the yellow light. By heaven, I shall never forgive myself if she proves to have the heels of us!"
She had slipped unseen through the yard-entrance and passed between two or three small craft, so that she had fairly got her speed up before we saw her. Now she was flying down the stream, near in to the shore, going at a tremendous rate. Jones looked gravely at her and shook his head.
"She is very fast," he said. "I doubt if we shall catch her."
"We must catch her!" cried Holmes between his teeth. "Heap it on, stokers! Make her do all she can! If we burn the boat we must have them!"
We were fairly after her now. The furnaces roared, and the powerful engines whizzed and clanked like a great metallic heart. Her sharp, steep prow cut through the still river-water and sent two rolling waves to right and to left of us. With every throb of the engines we sprang and quivered like a living thing. One great yellow lantern in our bows threw a long, flickering funnel of light in front of us. Right ahead a dark blur upon the water showed where the Aurora lay, and the swirl of white foam behind her spoke of the pace at which she was going. We flashed past barges, steamers, merchant-vessels, in and out, behind this one and round the other. Voices hailed us out of the darkness, but still the Aurora thundered on, and still we followed close upon her track.
"Pile it on, men, pile it on!" cried Holmes, looking down into the engine-room, while the fierce glow from below beat upon his eager, aquiline face. "Get every pound of steam you can."
"I think we gain a little," said Jones with his eyes on the Aurora.
"I am sure of it," said I. "We shall be up with her in a very few minutes."
At that moment, however, as our evil fate would have it, a tug with three barges in tow blundered in between us. It was only by putting our helm hard down that we avoided a collision, and before we could round them and recover our way the Aurora had gained a good two hundred yards. She was still, however, well in view, and the murky, uncertain twilight was settling into a clear, starlit night. Our boilers were strained to their utmost, and the frail shell vibrated and creaked with the fierce energy which was driving us along. We had shot through the pool, past the West India Docks, down the long Deptford Reach, and up again after rounding the Isle of Dogs. The dull blur in front of us resolved itself now clearly into the dainty Aurora. Jones turned our searchlight upon her, so that we could plainly see the figures upon her deck. One man sat by the stern, with something black between his knees, over which he stooped. Beside him lay a dark mass, which looked like a Newfoundland dog. The boy held the tiller, while against the red glare of the furnace I could see old Smith, stripped to the waist, and shovelling coals for dear life. They may have had some doubt at first as to whether we were really pursuing them, but now as we followed every winding and turning which they took there could no longer be any question about it. At Greenwich we were about three hundred paces behind them. At Blackwall we could not have been more than two hundred and fifty. I have coursed many creatures in many countries during my checkered career, but never did sport give me such a wild thrill as this mad, flying man-hunt down the Thames. Steadily we drew in upon them, yard by yard. In the silence of the night we could hear the panting and clanking of their machinery. The man in the stern still crouched upon the deck, and his arms were moving as though he were busy, while every now and then he would look up and measure with a glance the distance which still separated us. Nearer we came and nearer. Jones yelled to them to stop. We were not more than four boat's-lengths behind them, both boats flying at a tremendous pace. It was a clear reach of the river, with Barking Level upon one side and the melancholy Plumstead Marshes upon the other. At our hail the man in the stern sprang up from the deck and shook his two clenched fists at us, cursing the while in a high, cracked voice. He was a good-sized, powerful man, and as he stood poising himself with legs astride I could see that from the thigh downward there was but a wooden stump upon the right side. At the sound of his strident, angry cries, there was movement in the huddled bundle upon the deck. It straightened itself into a little black man — the smallest I have ever seen — with a great, misshapen head and a shock of tangled, dishevelled hair. Holmes had already drawn his revolver, and I whipped out mine at the sight of this savage, distorted creature. He was wrapped in some sort of dark ulster or blanket, which left only his face exposed, but that face was enough to give a man a sleepless night. Never have I seen features so deeply marked with all bestiality and cruelty. His small eyes glowed and burned with a sombre light, and his thick lips were writhed back from his teeth, Which grinned and chattered at us with half animal fury.
"Fire if he raises his hand," said Holmes quietly.
We were within a boat's-length by this time, and almost within touch of our quarry. I can see the two of them now as they stood, the white man with his legs far apart, shrieking out curses, and the unhallowed dwarf with his hideous face, and his strong yellow teeth gnashing at us in the light of our lantern.
It was well that we had so clear a view of him. Even as we looked he plucked out from under his covering a short, round piece of wood, like a school-ruler,
