human being that would set him on the right track.

  half hour's sturdy tramping brought him out of the tangled hills into civilization. There was a glitter of metal and vita-crystal dwellings that stood four-square to the sun and the winds. A broad ribbon-conveyor hurled its shining length in ceaseless rush down the narrow valley. Human beings—normal homely Earth men with the ordinary number of legs and arms, with honest-to-God faces and warm living flesh, were seated on the conveyor-benches as they flashed by. Hilary could have wept with delight. It was two years since he had seen his own kind; two years since Hurley's tragic misstep through the breach in the air-lock made by a meteor as they were nearing Mars.

Hilary leaped on the slow-moving ramp, skilfully worked his way across the graded speed belts until he was on the express conveyor that led straight on to New York.

He sank into a cushioned seat next to an oldish man with iron-gray hair through which the speed of their flight whipped and pulled. Hilary was bursting for real human conversation again; he grinned to himself at the excited astonishment of this impassive stranger if he should announce himself. How should he do it? Should he remark casually without any preamble: "Pardon me for addressing you, sir, but I'm Hilary Grendon, you know." Just like that, and lean back for the inevitable gasp: "What, not the Hilary Grendon!" And he would nod offhandedly as though he had just taken a little trip to Frisco and back.

He stole a sidelong glance at the sternly-etched profile. The man was staring straight in front of him, looking neither to the left nor to the right. It did not seem as if he were aware of Hilary's existence. So with a sigh Hilary decided against that method of approach as a trifle too abrupt.

"Nice day to-day, isn't it?" The sound of his own voice startled him. English was an alien language to his unaccustomed tongue after the hissing syllables of the Martians.

With pathetic eagerness he awaited the inevitable answer to this commonplace introduction; that he might once more hear normal Earth tones in friendly converse, see the smile of greeting on a real Earth face.

But there came no answer. The man continued staring straight ahead, immobile, fixed. There was no slightest turn to the etched profile. It was as if he had not heard.

ilary felt a sudden surge of anger. Damn discourteous, this first Earthman he had met. What had happened to the old hospitality? Had it passed out while he was roaming the spaces? He leaned over, harsh words tumbling for exit, when suddenly he checked himself. There was something strange about that fierce blank stare. The man's face, too, he saw now, was lined and worn; suffering had left its multitudinous imprint upon an ordinarily rotund countenance.

Hilary shouted suddenly: "Good morning." The man did not answer, nor did he stir from his unvarying pose. Deaf! The returned Earthman suffered swift pity. With gentle forefinger he prodded the man.

The reaction was astounding. The man cowered like a pricked balloon; little strangling moans forced themselves out of clenched teeth. Dumb, too! His face jerked around to the direction of Hilary's gentle prodding. Merciful heavens, the man was blind also! Two vacant red-rimmed sockets stared pitifully at him—the eyeballs were gone, ripped out.

But what struck Hilary particularly was the mortal terror that was depicted on the blind man's face. It was as though he expected some cruel, crippling blow to follow; as though it were the last straw on the back of unmentionable former agonies. Hilary shuddered. It was not good to witness such animal fear. A