From that we proceeded to give him, at his request, minute details of Garnesk's conclusions on the matter, and I am afraid I departed from the truth with a ready abandon and a certain relish of which I ought to have been most heartily ashamed.

When we stepped ash.o.r.e at Invermalluch Hilderman looked back across the water.

"If I'd waited for Fuller," he laughed, "I should have been stuck there yet. He's let the water go off the boil or something."

We went up to the house and had tea on the verandah, for the General had taken Myra up Loch Hourn in the motor-boat. After tea we got to business.

"Now that I've had a very refreshing cup of tea," the American remarked, "I feel rather like the mouse who said '_Now_ bring out your cat' when he had consumed half a teaspoonful of beer! Now show me the river."

"I don't want to sound at all panicky," I said, "but I think I ought to warn you that our experiences at the particular spot we are going to have--well, shall we say they have provided a striking contrast from the routine of our daily life?"

"I'm not at all afraid of the river, Mr. Ewart," he replied lightly.

"I should be the last person to doubt the statements of yourself and Miss McLeod and the General, but I am inclined to think the river has no active part in the proceedings."

"You hold the view that it was the merest coincidence that Miss McLeod and the General both had terrible and strange experiences at the same spot?" asked Dennis.

"It seems to be the only sensible view to hold," Hilderman declared emphatically. "I must say I think Miss McLeod's blindness might have happened in her own room or anywhere else, and the General's strange experience seems to me to be the delusion of overwrought nerves. I confess there is only one thing I don't understand, and that is the disappearance of the dog. That's got me beaten, unless it was that crofter."

"We intend to go to the Saddle to-morrow and make a few investigations. I was going by myself," I added cautiously, "but I think I can persuade Burnham to stay and go with me."

"I certainly should stay for that, Mr. Burnham," Hilderman advised.

"One more day can't make much difference."

"I'll think it over," said Dennis, careful not to commit himself rashly.

We came to the Dead Man's Pool, and crossed over the river, and began to walk up the other side.

"This is about the right time for a manifestation of the mystery," I remarked lightly, though I was far from laughing about the whole thing.

"Well," said Hilderman, "if we are to see the green flash in operation I hope it will be in a gentle mood, and not pull our teeth out one by one or anything of that sort." Evidently he had little sympathy with our fear of the green ray and the awe with which we approached the neighbourhood of the river.

"Are we going to the right place?" Dennis asked. "I mean the identical spot?"

"That lozenge-shaped thing up there is the Chemist's Rock," I replied, "and the other important place is Dead Man's Pool, which we have just left."

"Miss McLeod went blind on the Chemist's Rock, didn't she?" Dennis inquired.

"Yes," I replied, with a shudder. "She was fishing from it."

"Then suppose we go back to the pool," he suggested. We agreed readily enough, for I had no desire to hang about the fateful rock, and Hilderman for his part seemed to have no faith in the idea at all. I fancy he thought it would make no difference to us in what part of the river we might be, only provided we didn't fall in. So Dennis led the way back, and he was the first to pick his way to the middle of the stream. Hilderman and I were some distance behind. Suddenly we stopped stock-still, and looked at him. He had begun to cough and splutter, and he seemed rooted to the small stone he was standing on in the middle of the stream. In a flash I understood, and with a cry I bounded after him, Hilderman following at my heels.

"It's all right, Ewart," cried Hilderman behind me. "He's only choked, or something of that sort. He'll be all right in a minute."

Dennis had crossed to the centre of the stream by a way of his own, and we ran down to the stepping-stones by which we had come, in order to save the time which we should have been compelled to waste in feeling for a foothold as we went. Every second was of importance, and I fully expected to see Dennis topple unconscious into the pool below before I should be able to save him. I knew what it was exactly; he was going through my own horrible experience of "drowning on dry land," to quote Garnesk's vigorous phrase. Imagine my astonishment, therefore, when I reached Dennis's side with only a slight difficulty in breathing. There was no sign, or at least very little, of the air which was "heavier than water." Hilderman plunged along behind me, and we reached the stone on which my friend was standing almost simultaneously. Dennis held an arm pointing up the river, his face transfixed with an expression of horrified amazement. Suddenly Hilderman gave a hoa.r.s.e, shrill shout, breaking almost into a scream.

"Shut your eyes!" he yelled. "Shut your eyes! Oh, for heaven's sake, shut your eyes!"

But I never thought of following his advice. Dennis's immovable arm, pointing like an inanimate signpost up the river, fascinated me.

Slowly I raised my eyes in that direction. Then I stepped back with a startled cry, lost my footing, slipped, and fell on my face among the rocks.

_The river had disappeared!_

CHAPTER XV.

CONCERNS AN ILl.u.s.tRATED PAPER.

The river had disappeared!

In front of us was a great green wall of solid rock, which seemed to tower into the sky above us, and to stretch away for miles to right and left. The curious part about it was that the rock was undoubtedly solid. The shrubs that grew upon it, the great crevices and clefts, were all real. I knew--though I had a hard struggle to make myself believe--that it was all a marvellous and indescribable delusion, for there could be no cliff where only a few seconds before there had been a mighty, rushing torrent.

And yet I could have planted finger and foot on the ledges of that solid precipice and climbed to the invisible summit. Hilderman was muttering to himself beneath his breath, but I was too dazed, my brain was too numbed to make any sense out of the confused mumble of words which came from him. Dennis held my arm in a vice-like grip that stopped the circulation, and almost made me cry out with the pain.

Hilderman staggered, his arm over his eyes, across the stepping-stones to the side of the stream. I found my voice at last.

"Dennis!" I shouted at the top of my voice, though why I should have shouted I can never explain, for my friend was standing just beside me. "Dennis, come away, man. Get out of this!"

I exerted my strength to the uttermost, but Dennis was immovable, rooted to the spot by the strange, snake-like fascination of the nightmare. Then, as suddenly as it had arisen, the rock disappeared again, and there before our startled gaze was a peacefully flowing river. Dennis turned to me with a face as white as a sheet.

"The place is haunted," he said, with a somewhat hysterical laugh.

"Let's get away from it and sit down, and think it over," I urged, pulling him away. We made for the side of the river and sat down, at a very safe distance from the bank. I rolled up my sleeve, and had a look at my arm.

"Great Scott!" Dennis exclaimed, as I dangled the pinched and purple limb painfully. "What on earth did that?"

"I'm afraid it was your own delicate touch and dainty caress that did it, old man. You seized hold of me as if you hadn't seen me for years, and I owed you a thousand pounds."

"Ron, my dear fellow," he said penitently, "I'm most awfully sorry.

Why didn't you shout?"

I burst out laughing.

"I entered a protest in vigorous terms, but you were otherwise engaged at the moment, and, anyway, don't look so scared about it, old man; it'll be quite all right in a minute."

Poor Dennis was quite upset at the evidence I bore of his absorption in the miracle, and we postponed our discussion while he ma.s.saged the injured arm in order to restore the flow of blood.

"Where's Hilderman?" I asked presently, and though we looked everywhere for the American he was nowhere to be seen.

"He didn't look the sort to funk like that," said Dennis thoughtfully.

"I should have been prepared to bet he was quite brave," I concurred.

"Well, anyway," I added, "the main point is, what do you think of our entertainment? You've come a long way for it, but I hope you are not disappointed now you've seen it. It's original, isn't it?"

"By heaven, Ron!" he cried, "you're right. It is original. It is even a more unholy, indescribable mystery than I expected, and I never accused you of exaggerating it, even in my own mind."