But where could such a hound lie concealed, where did it get its food, where did it come from, how was it that no one saw it by day? It must be confessed that the natural explanation offers almost as many difficulties as the other. And always, apart from the hound, there is the fact of the human agency in London, the man in the cab, and the letter which warned Sir Henry against the moor. This at least was real, but it might have been the work of a protecting friend as easily as of an enemy. Where is that friend or enemy now? Has he remained in London, or has he followed us down here? Could he--could he be the stranger whom I saw upon the tor?
It is true that I have had only the one glance at him, and yet there are some things to which I am ready to swear. He is no one whom I have seen down here, and I have now met all the neighbours. The figure was far taller than that of Stapleton, far thinner than that of Frankland. Barrymore it might possibly have been, but we had left him behind us, and I am certain that he could not have followed us. A stranger then is still dogging us, just as a stranger dogged us in London. We have never shaken him off. If I could lay my hands upon that man, then at last we might find ourselves at the end of all our difficulties. To this one purpose I must now devote all my energies.
My first impulse was to tell Sir Henry all my plans. My second and wisest one is to play my own game and speak as little as possible to anyone. He is silent and distrait. His nerves have been strangely shaken by that sound upon the moor. I will say nothing to add to his anxieties, but I will take my own steps to attain my own end.
We had a small scene this morning after breakfast. Barrymore asked leave to speak with Sir Henry, and they were closeted in his study some little time. Sitting in the billiard-room I more than once heard the sound of voices raised, and I had a pretty good idea what the point was which was under discussion. After a time the baronet opened his door and called for me.
"Barrymore considers that he has a grievance," he said. "He thinks that it was unfair on our part to hunt his brother-in-law down when he, of his own free will, had told us the secret."
The butler was standing very pale but very collected before us.
"I may have spoken too warmly, sir," said he, "and if I have, I am sure that I beg your pardon. At the same time, I was very much surprised when I heard you two gentlemen come back this morning and learned that you had been chasing Selden. The poor fellow has enough to fight against without my putting more upon his track."
"If you had told us of your own free will it would have been a different thing," said the baronet, "you only told us, or rather your wife only told us, when it was forced from you and you could not help yourself."
"I didn't think you would have taken advantage of it, Sir Henry--indeed I didn't."
"The man is a public danger. There are lonely houses scattered over the moor, and he is a fellow who would stick at nothing. You only want to get a glimpse of his face to see that. Look at Mr. Stapleton's house, for example, with no one but himself to defend it. There's no safety for anyone until he is under lock and key."
"He'll break into no house, sir. I give you my solemn word upon that. But he will never trouble anyone in this country again. I assure you, Sir Henry, that in a very few days the necessary arrangements will have been made and he will be on his way to South America. For God's sake, sir, I beg of you not to let the police know that he is still on the moor. They have given up the chase there, and he can lie quiet until the ship is ready for him. You can't tell on him without getting my wife and me into trouble. I beg you, sir, to say nothing to the police."
"What do you say, Watson?"
I shrugged my shoulders. "If he were safely out of the country it would relieve the tax-payer of a burden."
"But how about the chance of his holding someone up before he goes?"
"He would not do anything so mad, sir.