"I shall speak to Williams through the transmitter," explained Mortimer, "and he shall hear me by means of the ear phones. When he answers into his transmitter, we will hear him through the loud speaker."

      He seated himself before the apparatus and spoke: "Williams, do you hear me?"

      "I hear you." The reply came promptly, but in the heavy tones of a man talking in his sleep.

      "Listen to me. You are living in the last six days of the earth. By 'days,' I do not mean periods of twenty-four hours, but such lengths of time as are meant in the first chapter of the book of Genesis. It is now the first day of the six. Tell me what you see."

      After a short interval, the answer came in a strange, high key. While the words were English, they were spoken with a curious intonation that was at first difficult to understand.

      "This is the year 16,812," said the voice, "or, in modern time, 43,930 A. I. C. After Interplanetary Communication. It is not well upon the earth. The Polar Ice Cap comes down almost to Newfoundland. Summer lasts but a few weeks, and then its heat is scorching. What in early time was known as the Atlantic Coastal Plain has long ago sunken into the sea. High dykes must be used to keep the water from covering the island of Manhattan, where the world's government is located. A great war has just concluded. There are many dead to bury."

      "You speak of interplanetary communication," said Mortimer. "Is the world, then, in communication with the planets?"

      "In the year 2,952," came the answer, "the earth succeeded in getting into communication with Mars. Radio pictures were sent back and forth between the two worlds until they learned each other's languages; then sound communication was established. The Martians had been trying to signal the earth since the beginning of the twentieth century, but were unable to set up a system of communication because of the insufficient scientific advancement of the Earthmen.

      "About a thousand years later, a message was received from Venus, which had now advanced to the earth's state of civilization, when Mars was signalled. For nearly five hundred years they had been receiving messages from both the earth and Mars, but had been unable to answer.

      "A little over five thousand years later, a series of sounds was received which seemed to come from somewhere beyond Venus. Venus and Mars heard them too; but, like us, were able to make nothing of them. All three worlds broadcasted their radio pictures on the wave length corresponding to that of the mysterious sounds, but received no answer. At last Venus advanced the theory that the sounds had come from Mercury, whose inhabitants, obliged to live upon the side of their world farther from the sun, would be either entirely without sight or with eyes not sufficiently developed to see our pictures.

      "Recently something dire has happened to Mars. Our last messages from her told of terrible wars and pestilences, such as we are now having upon earth. Also, her water supply was beginning to give out, due to the fact that she was obliged to use much of it in the manufacture of atmosphere. Suddenly, about fifty years ago, all messages from her ceased; and upon signalling her, we received no answer."

      Mortimer covered the transmitter with his hand. "That," he said to me, "can mean only that intelligent life upon Mars had become extinct. The earth, then, can have but a few thousand years yet to go."

      For nearly an hour longer he quizzed Williams upon conditions of the year 46,812. All the answers showed that while scientific knowledge had reached an almost incredulous stage of advancement, the race of mankind was in its twilight. Wars had killed off thousands of people, while strange, new diseases found hosts of victims daily in a race whose members were no longer physically constituted to withstand them. Worst of all, the birth rate was rapidly diminishing.

      "Listen to me." Mortimer raised his voice as if to impress his invisible subject with what he was about to say. "You are now living in the second day. Tell me what you see."

      There was a moment or so of silence; then the voice, keyed even higher than before, spoke again.

      "I see humanity in its death-throes," it said. "Only a few scattered tribes remain to roam over the deserted continents. The cattle have begun to sicken and die; and it is unsafe to use them for food. Four thousand years ago, we took to the manufacture of artificial air, as did the Martians before us. But it is hardly worth while, for children are no longer born. We shall be the last of our race."

      "Have you received no recent word from Mars?" asked Mortimer.

      "None. Two years ago, at her proper season, Mars failed to appear in the heavens. As to what has become of her, we can only conjecture."

      There was a horrible suggestiveness about this statement. I shuddered, and noticed that Mortimer did, also.

      "The Polar Ice Cap has begun to retreat," resumed the voice. "Now it is winters that are short. Tropical plants have begun to appear in the temperate zones. The lower forms of animal life are becoming more numerous, and have begun to pursue man as man once pursued them. The days of the human race are definitely numbered. We are a band of strangers upon our own world."

      "Listen to me," said Mortimer again. "It is now the third day. Describe it."

      Followed the usual short interval of silence; then came the voice, fairly brittle with freezing terror.

      "Why," it screamed, "do you keep me here: the last living man upon a dying planet? The world is festering with dead things. Let me be dead with them."