"Now we can have our chat," said Mr. Rivers, as we left the hotel together. "According to present appearances we have plenty of time before us, and nothing certainly can be done to-day. Whether anything at all can be done remains to be seen. Sometimes in an inquiry of a delicate nature we come to a block, and the next step depends entirely upon chance; it may be so in this case. I had best commence by telling you my position in the affair, and it will do no harm if I am quite frank with you. First and foremost, then, I am totally ignorant of what it is you wish to discover. My employer calls me into his private room, and gives me certain instructions. 'A gentleman has just arrived from the Continent,' he says, 'and is stopping at the Métropole. You will take him in hand, and keep close watch upon his movements. You are not to leave him a moment, and you are not for one moment to lose sight of him.' We generally hunt in couples when instructions like those are given, because it isn't possible for one man to keep watch day and night, so while I was in London on the job I had a comrade, and we divided the watch so that we could get some sleep. I asked my employer if the instructions were to be carried out to the strict letter. 'To the strict letter,' he answered. 'Suppose the gentleman suddenly goes abroad?' I asked. 'You are to follow him,' he answered. That was the reason of my sudden disappearance from London, without having had time to consult my employer. I went alone, without my comrade; I did not feel warranted in incurring double expenses, and I thought I could manage the affair by myself when we were out of England. I was right, as it has turned out. Mr. Nisbet is here with another gentleman, and has taken up his quarters in a house about two miles away, which he has inhabited on and off for several years."
"Is that your idea of shadowing a man," asked Ronald, "when you are instructed not to lose sight of him for a moment and to keep close watch upon all his movements?"
"Begging your pardon, sir," replied Mr. Rivers, not the least ruffled by the rather sharp manner in which the question was asked, "a man can do no more than his best, and I have done that. Then he must be guided by circumstances. Keeping a watch upon a man in London is one thing; keeping watch upon him in a village like this is another. There is no place in the world in which a man can lose himself so easily, if he is inclined that way, as London. I tell you, it's a difficult job to carry out properly, to keep your eye on a man in a large city, with its windings and turnings and crowds of people pushing this way and that. He gives you the slip when you least expect it, and there's the labor of days and weeks thrown away. It is quite a different matter here. A man comes and a man goes, and he can't keep his coming and going from the few people there are about. There are no cabs and omnibuses, no crowds to worry you and put you off the scent. When he moves from one spot to another he has to make preparations; he has to walk along unfrequented roads where he is in full sight of anyone interested in him. There are other drawbacks which one who knows the ropes has to reckon with. He can't keep watch here as he does in a large city; if he prowls and sneaks about, if he's seen haunting a particular spot for days, if he shadows a particular house and keeps his eye on it continually, he draws notice to himself. People ask what for? It comes to the ears of the man he's observing who, in turn, shadows him, and there's his apple cart upset. Another consideration. Strike a man in a street in London, and a crowd collects. Strike a man on the head here when he's prowling up and down a lonely road, and no one sees it. Down he goes like a stone, and he can be done to death, and his body hidden in a hundred holes--and who's the wiser? That couldn't well be done, I grant you, to man, woman, or child who lives here; the absence is remarked, and the relations don't rest till they've found out what has become of the missing one. It's different with a stranger, who stops a day or so, or a week or so, and then, without a word, disappears. So long as he's here the hotel keeper takes an interest in him, because of the bill; the moment he's gone he's forgotten, and it's make way for the next. I've been employed on some difficult jobs in my time, and I'm not sure that this is not going to beat the record."