His words conveyed finality. They got into a taxi, tipped the porter, who had been staring in amazement at the venerable figure of the scientist, and were conveyed slowly and noisily to the house in the north of London where the laboratory was, the scene of their labours of years.

And the whole way Professor Ebor uttered no word, nor did Dr. Laidlaw find the courage to ask a single question.

It was only late that night, before he took his departure, as the two men were standing before the fire in the study—that study where they had discussed so many problems of vital and absorbing interest—that Dr. Laidlaw at last found strength to come to the point with direct questions. The professor had been giving him a superficial and desultory account of his travels, of his journeys by camel, of his encampments among the mountains and in the desert, and of his explorations among the buried temples, and, deeper, into the waste of the pre-historic sands, when suddenly the doctor came to the desired point with a kind of nervous rush, almost like a frightened boy.

"And you found—" he began stammering, looking hard at the other's dreadfully altered face, from which every line of hope and cheerfulness seemed to have been obliterated as a sponge wipes markings from a slate—"you found—"

"I found," replied the other, in a solemn voice, and it was the voice of the mystic rather than the man of science—"I found what I went to seek. The vision never once failed me. It led me straight to the place like a star in the heavens. I found—the Tablets of the Gods."

Dr. Laidlaw caught his breath, and steadied himself on the back of a chair. The words fell like particles of ice upon his heart. For the first time the professor had uttered the well-known phrase without the glow of light and wonder in his face that always accompanied it.

"You have—brought them?" he faltered.

"I have brought them home," said the other, in a voice with a ring like iron; "and I have—deciphered them."

Profound despair, the bloom of outer darkness, the dead sound of a hopeless soul freezing in the utter cold of space seemed to fill in the pauses between the brief sentences. A silence followed, during which Dr. Laidlaw saw nothing but the white face before him alternately fade and return. And it was like the face of a dead man.

"They are, alas, indestructible," he heard the voice continue, with its even, metallic ring.