The well-meant gabble of the servant touched me to the quick. I lay down upon my bed, and bit my lip that I should not cry out loud in the sharp anguish of my terror and bewilderment. Indeed, I was almost mad with dread; I believe that if it had been daylight I should have fled hot foot, forgetting all courage and all the debt of gratitude that was due to Professor Gregg, not caring whether my fate were that I must starve slowly so long as I might escape from the net of blind and panic fear that every day seemed to draw a little closer round me. If I knew, I thought, if I knew what there were to dread, I could guard against it; but here, in this lonely house, shut in on all sides by the olden woods and the vaulted hills, terror seems to spring inconsequent from every covert, and the flesh is aghast at the half-heard murmurs of horrible things. All in vain I strove to summon scepticism to my aid, and endeavored by cool common-sense to buttress my belief in a world of natural order, for the air that blew in at the open window was a mystic breath, and in the darkness I felt the silence go heavy and sorrowful as a mass of requiem, and I conjured images of strange shapes gathering fast amidst the reeds, beside the wash of the river. In the morning, from the moment that I set foot in the breakfast-room I felt that the unknown plot was drawing to a crisis; the professor's face was firm and set, and he seemed hardly to hear our voices when we spoke. "I am going out for rather a long walk," he said, when the meal was over. "You mustn't be expecting me, now, or thinking anything has happened if I don't turn up to dinner. I have been getting stupid lately, and I dare say a miniature walking tour will do me good. Perhaps I may even spend the night in some little inn, if I find any place that looks clean and comfortable." I heard this, and knew by my experience of Professor Gregg's manner that it was no ordinary business or pleasure that impelled him. I knew not, nor even remotely guessed, where he was bound, nor had I the vaguest notion of his errand, but all the fear of the night before returned; and as he stood, smiling, on the terrace, ready to set out, I implored him to stay, and to forget all his dreams of the undiscovered continent. "No, no, Miss Lally," he replied, still smiling, "it's too late now. _Vestigia nulla retrorsum_, you know, is the device of all true explorers, though I hope it won't be literally true in my ease. But, indeed, you are wrong to alarm yourself so; I look upon my little expedition as quite commonplace; no more exciting than a day with the geological hammers. There is a risk, of course, but so there is on the commonest excursion. I can afford to be jaunty; I am doing nothing so hazardous as 'Arry does a hundred times over in the course of every Bank Holiday. Well, then, you must look more cheerfully; and so good-by till to-morrow at latest."