Besides, the one man who was picked up has luckily been able to talk a little already. I am certain there was no torpedo attack."

"She simply blew up then?"

"That was it."

"Accident or design?"

"G.o.d knows! Perhaps no one else ever will. It may have merely been the ammunition. As you know, that has happened before now. But it's a very curious coincidence that it should have happened off Ransay, knowing what we know. I hear a lot of the men were ash.o.r.e buying things. I wonder what they brought aboard with them!"

"I can tell you what one lot brought: eggs, poultry, cheeses, and a large parcel in newspaper which I took to be b.u.t.ter. But that was only one party I happened to see. They were all over the island."

He thought in silence for a few moments, and then he glanced at his watch.

"Look here, old chap," he said, "I'm afraid I must be getting off again now. Walk back with me as far as it's safe and I'll tell you something that you must know. We can discuss the evidence later, when a little more has been collected. The point that concerns you is that Bolton has been sent for again."

"The devil he has! Do I retire then?"

"Not at all. You see n.o.body in these parts is in the Hobhouse secret, so they sent for Bolton at once to make his own kind of enquiries while we make ours. You of course go on making yours in your own way just the same. All the same I think it would be tactful to stand aside--with your eyes open of course--while Bolton is on the job."

"Tactful," I agreed, "but a little annoying."

"Well, Roger, it can't be helped, I'm afraid. I'm not the boss here and the man is on his way now as fast as he can travel. And now what about telling him who you really are? I've been thinking it over, and if you are agreeable I think I ought to."

I saw that this meant that he had decided he was going to, so I merely said:

"If you think it best, certainly tell him. Only swear him to secrecy."

"Certainly. And I'm sure the man himself will see the point in that. But you see if I didn't tell him who you really were, he'd very likely put you down as a suspicious character and recommend your removal."

"You're quite right," I agreed.

"Besides what you know may help him, and it would be a dog in the manger kind of game to keep back anything, now that he has taken up the business."

"Right again. Well, I'll keep my nose out of the business till Bolton has had his innings."

"Good man!" said Jack. "Well, we'd better separate now. Good luck to you both!"

I trust I am not of an unduly jealous disposition, but being thus asked to take a back seat just as something really definite had happened was a strain on my philosophy. The tragedy of the _Uruguay_ might not have anything to do with the secret agency in the island--though I felt in my bones it had, and Mr. Bolton might come and go and leave me possibly with a little information to help my own quest. Still, it was annoying.

At the same time, my cousin's arguments were absolutely sound and I saw perfectly that it would have been both foolish and ungenerous to play Hobhouse with the man. So I went back and picked up a novel and tried to dismiss the whole business from my mind in the meantime.

For the next twenty-four hours the island was full of gruesome stories and the wildest rumours, but for most of the time Mr. Hobhouse stayed at home and finished his novel. It was on the evening of the day after the tragedy, when the doctor and he were sitting over the smoking room fire, lighting their pipes after tea, that the bell rang. "Hallo, who's that at this hour?" said the doctor.

I heard a heavy footstep in the pa.s.sage, and guessed, but the only announcement was that a gentleman wished to see Dr. Rendall. He was out of the room for a long time, nearly an hour by the clock, and when he came back his manner was serious and a little apologetic.

"I'm sorry to disturb you, Mr. Hobhouse," said he, "and I a.s.sure you there is nothing to worry about, but the fact is a detective is here and wants to have a word with you."

"A detective!" exclaimed Mr. Hobhouse nervously. "You don't say so? Dear me, what can he want me for!"

"He's a man Bolton," said the doctor, "the very man who came up about six months ago under the name of Thompson and gave himself out as a cattle dealer. By Jove, I can see now what he came for! But anyhow it's about the _Uruguay_ business this time and he is interviewing everybody, and if you don't mind, he'd like a few words with you."

I went into the dining room and saw for the first time my rival. He was a big, st.u.r.dy, red-faced man, with a plain bluff manner, an ideal dealer; but his eyes were shrewd and keen. In fact once I had looked into them I put him down as a better man than I had fancied. We exchanged a conventional word on either side, and then both of us instinctively glanced at the door.

"Better speak quietly, Mr. Merton," said he.

I nodded and said with a smile: "So you are not here as a dealer this time, Mr. Bolton?"

"No," said he, "I want to get straight to business, and there's too much humbug and waste of time if one has to talk cattle for half an hour first. Besides, after what has just happened they'd be quite sharp enough here to tumble to the game. Anyhow, the people I want to get at would be, and there's no point in humbugging the others."

"Well," I said, "you know what I'm here for, and though I'm sorry to say I haven't been able to pick up much so far, anything I have picked up is at your service."

"Much obliged, Mr. Merton," said he. "We're like a couple of terriers after the same rat, and as long as we get him that's all that matters.

You've had your go and now I'm going to have a little go."

He laughed genially, but it was clear enough that when he said two terriers, he meant one terrier at a time, and I accepted the situation frankly.

"Right you are," I said. "I'll take a breather while you go in and finish him off. Only of course if you want me to lend a hand, here I am, with nothing else to do."

He seemed distinctly relieved by this declaration and grew more friendly than ever.

"Well now to come to business," he said. "I must tell you frankly in the first place, Mr. Merton, that there were some things in your story last time you were here that I didn't know just how much to believe in. The most truthful people sometimes imagine the queerest things. If you'd had my experience, Mr. Merton, you'd feel just the same about a tale like yours. But now I know you and know what's been happening here, and particularly what's happened yesterday, it's a different story. Do you mind just telling me in your own words about what you saw last time and anything you've noticed this trip?"

My opinion of Mr. Bolton's shrewdness continued to rise as I noticed his close attention to my tale and how much to the point his questions were.

Every now and then he stopped me while he made a jotting in a fat little brown leather pocket book, and at the end he observed.

"Well, Mr. Merton, it's a queer case but I daresay I may be able to throw a bit of light on things before I've done."

I wondered very much, and from the look on his face I do not believe for a moment that he saw a single blink of light at that time.

"And now," said he, "coming to this explosion, I don't want to hear anything more about the flames and smoke and such like. All that is for the Navy people. It doesn't come under the head of my department, Mr.

Merton; but this buying of stuff ash.o.r.e and taking parcels aboard the ship, that does come under it. In fact that's what I'm up here to investigate, for it's pretty clear even to a man like me that knows nothing of ships that any one on this island couldn't swim out and hold a match to a ship o' war and blow her up that way! If it _was_ done from here, it must have been by one of those parcels."

"Obviously," I agreed. "And I also agree that it's for the experts to decide whether a bomb could be slipped into a paper parcel of b.u.t.ter or a large cheese, or anything else they bought; and for you simply to find out exactly what was bought and who sold it."

"A paper parcel of b.u.t.ter and a large cheese," he repeated. "Did you happen to see any of those things being sold yourself?"

"I happened to pa.s.s some blue jackets who had just bought them."

He made me tell him exactly the circ.u.mstances of my seeing the men and my pa.s.sing Peter and Jock previously; precisely in fact as I have told it in this account. He thought for a few moments in silence after I had finished and then asked me if I knew definitely of any other people who had sold anything to the sailors.

"I happen to know for certain of Dr. Rendall and his cousin Mr. Philip Rendall--or rather Mr. Philip Rendall's farmer, but from all I saw and all I heard I fancy the difficulty will be to find a house that did not sell something."

He nodded thoughtfully.

"That's exactly the difficulty," he said, and then he rose and held out his hand. "Goodnight, Mr. Merton, I'm much obliged to you and I'll promise you to make an excuse for looking you up very soon again and letting you know how I am getting on. By the way, you had better tell the doctor I was much interested in your account of how the explosion happened. That will account for my calling again."

"I must have detective instincts myself," I smiled. "I had already thought of the same lie."

In fact it came in very handy no later than Mr. Bolton's departure that night. The doctor wondered very much what the detective had to say to his patient that took him so long to tell, and his curiosity was satisfied as per arrangement.