This glass is pretty good, but not like my old one that I left in town. Would you mind examining the thing yourself, and telling me how many characters are cut on it?'

He handed me the object in his hand. I saw that it was the black seal he had shown me in London, and my heart began to beat with the thought that I was presently to know something. I took the seal, and, holding it up to the light, checked off the grotesque dagger-shaped characters one by one.

'I make sixty-two,' I said at last.

'Sixty-two? Nonsense; it's impossible. Ah, I see what you have done, you have counted that and that,' and he pointed to two marks which I had certainly taken as letters with the rest.

'Yes, yes,' Professor Gregg went on, 'but those are obviously scratches, done accidentally; I saw that at once. Yes, then that's quite right. Thank you very much, Miss Lally.'

I was going away, rather disappointed at my having been called in merely to count the number of marks on the black seal, when suddenly there flashed into my mind what I had read in the morning.

'But, Professor Gregg,' I cried, breathless, 'the seal, the seal. Why, it is the stone Hexecontalithos that Solinus writes of; it is Ixaxar.'

'Yes,' he said, 'I suppose it is. Or it may be a mere coincidence. It never does to be too sure, you know, in these matters. Coincidence killed the professor.'

I went away puzzled by what I had heard, and as much as ever at a loss to find the ruling clue in this maze of strange evidence. For three days the bad weather lasted, changing from driving rain to a dense mist, fine and dripping, and we seemed to be shut up in a white cloud that veiled all the world away from us. All the while Professor Gregg was darkling in his room, unwilling, it appeared, to dispense confidences or talk of any kind, and I heard him walking to and fro with a quick, impatient step, as if he were in some way wearied of inaction. The fourth morning was fine, and at breakfast the professor said briskly:

'We want some extra help about the house; a boy of fifteen or sixteen, you know. There are a lot of little odd jobs that take up the maids' time which a boy could do much better.'

'The girls have not complained to me in any way,' I replied. 'Indeed, Anne said there was much less work than in London, owing to there being so little dust;'

'Ah, yes, they are very good girls. But I think we shall do much better with a boy. In fact, that is what has been bothering me for the last two days.'

'Bothering you?' I said in astonishment, for as a matter of fact the professor never took the slightest interest in the affairs of the house.

'Yes,' he said, 'the weather, you know. I really couldn't go out in that Scotch mist; I don't know the country very well, and I should have lost my way. But I am going to get the boy this morning.'

'But how do you know there is such a boy as you want anywhere about?'

'Oh, I have no doubt as to that. I may have to walk a mile or two at the most, but I am sure to find just the boy I require.'

I thought the professor was joking, but, though his tone was airy enough, there was something grim and set about his features that puzzled me. He got his stick, and stood at the door looking meditatively before him, and as I passed through the hall he called to me.

'By the way, Miss Lally, there was one thing I wanted to say to you. I dare say you may have heard that some of these country lads are not over-bright; "idiotic" would be a harsh word to use, and they are usually called "naturals", or something of the kind. I hope you won't mind if the boy I am after should turn out not too keen-witted; he will be perfectly harmless, of course, and blacking boots doesn't need much mental effort.'

With that he was gone, striding up the road that led to the wood, and I remained stupefied; and then for the first time my astonishment was mingled with a sudden note of terror, arising I knew not whence, and all unexplained even to myself, and yet I felt about my heart for an instant something of the chill of death, and that shapeless, formless dread of the unknown that is worse than death itself. I tried to find courage in the sweet air that blew up from the sea, and in the sunlight after rain, but the mystic woods seemed to darken around me; and the vision of the river coiling between the reeds, and the silver grey of the ancient bridge, fashioned in my mind symbols of vague dread, as the mind of a child fashions terror from things harmless and familiar.

Two hours later Professor Gregg returned. I met him as he came down the road, and asked quietly if he had been able to find a boy.

'Oh, yes.' he answered; 'I found one easily enough. His name is Jervase Cradock, and I expect he will make himself very useful. His father has been dead for many years, and the mother, whom I saw, seemed very glad at the prospect of a few shillings extra coming in on Saturday nights. As I expected, he is not too sharp, has fits at times, the mother said; but as he will not be trusted with the china, that doesn't much matter, does it? And he is not in any way dangerous, you know, merely a little weak.'

'When is he coming?'

'Tomorrow morning at eight o'clock. Anne will show him what he has to do, and how to do it. At first he will go home every night, but perhaps it may ultimately turn out more convenient for him to sleep here, and only go home for Sundays.'

I found nothing to say to all this; Professor Gregg spoke in a quiet tone of matter-of-fact, as indeed was warranted by the circumstance; and yet I could not quill my sensation of astonishment at the whole affair. I knew that in reality no assistance was wanted in the housework, and the professor's prediction that the boy he was to engage might prove a little 'simple,' followed by so exact a fulfilment, struck me as bizarre in the extreme. The next morning I heard from the housemaid that the boy Cradock had come at eight, and that she had been trying to make him useful.