Here Eileen paused a moment for breath, and the two other girls glanced at each other guiltily, but they said nothing. Then Eileen went on:

“One night, just after I came, there was an attempt to rob him at the hotel. The attempt failed because Geoffrey happened to be awake and discovered some one prowling about Grandfather’s sitting-room. Whoever it was escaped through the window without even his face being seen, and there was no trace of him later. Grandfather made Geoffrey keep the thing quiet and not report it to the hotel, because he didn’t want any publicity about the matter. But he decided then that it would be safer to have the thing hidden somewhere for a time—in some place where no one would dream of hunting for it. And it struck him that down at the bungalow where he had spent those quiet weeks, and which he supposed was all shut up and deserted, would be as unlikely a spot as any to be suspected of hiding such a thing. He supposed that the one next door—this one—was closed also, or I do not think he would have considered that hiding-place.

“So the next night, which happened to be one when there was a very hard storm, he sent Geoffrey down to the bungalow with the little box containing the letters. He did not wish him to take the car, as it might be too conspicuous, but had him go on foot. Geoffrey had found out, during the summer, that one could get into that place through a door at the side by working at the hook through the crack with a knife-blade, and he intended to get into the cottage and conceal the box in some out-of-the-way hiding-place there.

“But here is where the mystery begins. Geoffrey set off that night, but has never been seen or heard of since. What has happened to him, we cannot imagine, unless he was caught and taken a prisoner by some one concerned in getting those letters. If he had been killed, we would surely know it. Yet if he were alive, it seems as if we should have heard from him, somehow. He was a most devoted and faithful and trustworthy soul, so we are sure that something must have happened to him—that he is being detained somewhere. Grandfather is quite certain that he is guarding the secret of that box, somehow, and that it would be best to wait till he comes back or sends us some word.

“What Grandfather asked me to do was to run out here in the car some day, and, if there was no one about, to scout around and see if I could discover any clue to the mystery, without attracting attention. He supposed, of course, that the beach was by that time entirely deserted. I came out the very next day, but found to my disgust that the cottage next door was occupied—by you, as I now know! But I felt it would not be wise to be seen about here in the daytime, so, without saying anything to Grandfather (who would be awfully upset if he knew it), I determined to run out about ten o’clock that night and scout around when you people would probably be in bed.

“And here is where Ted comes into it! I got here that night as I had planned, found no one about, and tried the experiment of getting into the side door, as Grandfather had explained, but I found it very difficult; in fact, quite impossible—for me! And while I was fussing with it, I was suddenly startled by a low voice, right behind me, inquiring very politely what I was trying to do! It was Ted, here, who had been out for a stroll, and happening to catch a glimpse of me at this very peculiar occupation, and naturally thinking I was a burglar, had come up unobserved to find out about it!

“You can just imagine what an awful position it was for me! I did not know what to say or what to do. I know that, legally, I had no business there, and if he were inclined to make a fuss about it, he could have me arrested. I literally almost went out of my mind at that moment. But I guess something must have made him feel that I wasn’t really a ‘lady burglar’ or anything of that sort, for he just said, very kindly, ‘If you are in trouble, perhaps I can help you!’

“I didn’t see how he could possibly help me unless he knew the whole story, and I thought I ought not tell any one that! But unless I did, I was certainly in a very terrible position. So I suddenly made up my mind it would have to be done, for something made me feel he was honorable and trustworthy, and that the secret would be safe with him. What made me feel all the more sure was that he mentioned that he was staying up the beach at his father’s bungalow, and had happened to be out for a walk and had seen me there. I know he said it to make me feel easier, and that everything was all right.

“So I told him as much as I could of the story. And when he had heard it, he said: ‘I happen to know all about opening that door, because I know the people who own the cottage very well. Perhaps you had better let me try.’ I said I’d be only too glad to, and he had the door unfastened in a moment. Then he told me to go in and examine the place all I wished to and he would watch outside. If I needed any help, I could call and he would come in and do what he could for me.

“Well, I went in and examined the whole place with my electric torch, but I could not discover a single thing except that one of the bricks in the fireplace had been partly loosened and a broken knife-blade was in the corner of the chimney-place. It was the only thing I could see to show that possibly Geoffrey had been there. I thought the knife-blade looked like one I had seen him use.