But I do know this: if dot sand was not here—vell, I shudder to t'ink off vat vould be today.'
"I stared.
"'You do not understand? Ach, so! You haf vat happened to dot stick? Und to dot gun of steel? So! Look, now.'
"He took off his hat and went over to the border of the patch. He touched—just barely touched the brim of the hat to the gray matter and held it up. Already a growth was moving up the linen. He nodded, then threw it away, onto the sand. Speechless, we watched it fade away under the merciless attack of that horrible stuff, and then, in turn, the gray fungoid growth wither and disappear.
"'Now do you understand? Do you see vat I meant? Vood, steel, linen—eferyt'ing vat it touches it eats. It grows fast—like flame in dry sticks. All-consuming. Aber—siest du—dot sand—ven it touched dot, it died. It starved. Und see! Look close—more closer still at dot sand. Do you see anything odd about it?'
"I shook my head. It looked very fine and light, but I could not see anything unusual.
"'No? Iss it not glass, dot sand? Look at it und at der sand vere dot T'ing has not been, and see if it is not so different.'
"I picked up some sand from under my foot. And then I saw what he had seen at once. The sand in my hand was coarser, dirtier—in short, like any fine-grained sand you may have seen. But the sand where the Grey had fallen was clear, glasslike. It was almost transparent, and I saw that what was there was a mass of silicon particles. I nodded.
"'Yes,' I said, 'I see now. That stuff has eaten out every particle of mineral, of dirt and dust, but not the silicon!'
"'Egsactly! Und dot iss vat has safed us from—Gott only knows vot! I do not know what dot stuff vill eat, but I de know it vill not eat silicon, Vy? I do not know. Dot iss yet a mystery. So—it starts——ach, dot too, I do not know—but it starts somewhere. Und it eats und grows, und grows and eats, and eferyt'ing vot it touches it consumes—egcept sand. Sand stops it.
"'It eats out der stuff in der sand, but not der silica, und starves and dies. It is a miracle. If der sand vas not here—ach, Gott!—it vould keep on going until—vell—I do not know! I haf nefer seen dot before. I am intrigued, und I am going to take dot stuff—oh, only a liddle bit—und I shall not rest until I haf learned something about it. Und, because I haf seen it does not lige sand, I vill make for it a cage—a liddle box of glass; und study it lige it vas a bug. Not?'
"We returned to where our natives still stood with our packs. We quickly fitted together some microscopic slides into a rough box and bound it about with string. With it, we returned to the edge of the gray patch. Von Housmann knelt down and carefully scooped up a bit of the fungus with a glass spatula he had brought along. He dumped this into his box and waited. In five minutes it had disappeared. He looked up blankly.
"'You forgot, Sigmund,' I said, smiling at his woeful expression. 'It starves on silicon. It won't live in glass.'
"Ach. Dumkopf! Of course! I haf forgot dot. But, ve vill fool dot hell-plant. He goes yet on hunger-strike-no? Ve try now dot forcible feeding.'
"He took out his knife and cut from a near-by tree several small splinters.
"'Ve vill feed him, so. Dot vood, it vill be for him a greadt feast, und he shall eat und eat, und we vill study him und see vot we vill see.'
"Laughing, he bent over and shook out the tiny gray residue which was in the box. He dropped in a sliver of wood and was bending over to refill his box when I felt a sting on my foot. I looked down, and my heart stood still.
"On my shoe, just in between the laces, was a spot of gray. I could not move. I was cold. I can not describe how I felt, but I seemed turned to stone. My flesh quivered and shrank and I was sick—very sick. Sigmund looked up, startled, and then he looked at my feet.
"The next thing I knew I was on my back, my foot in his hand. One slash of his knife across the thongs which laced my boot, and he jerked it off.
"The biting grew worse. I heard him gasp, and then I felt a sharp pain. My head swam and I must have fainted. I regained consciousness—I don't know how soon after—and I found myself back under the trees. I looked at my foot, which was throbbing and burning like fire. It was swathed in a bandage that Von Housmann had taken from his emergency kit and was wrapping around the instep. It was deeply stained with blood. I moved, and he looked up. He smiled when he saw I was conscious.
"'Dot was a close shave—yes? It had just eaten into der shoe as I pulled it off und one spot—lige a bencil dot—on your skin vas gray. So I cut it out and all around it, und so you haf a hole in your foot, but—you haf your foot. Now so! You lie here, und I get der niggers and ve take you to bed.'
"A tent was soon erected and I was carried into it. For two days I lay there, delirious half the time. Sigmund never left my side. He even slept there. He was insistent that it was his fault. He said one of the apparently dead fungi had dropped on my shoe and had revived there. That is, the plant, instead of dying, had shriveled up, but the life-nucleus was still strong. I shudder even now when I think of what might have been.
"At the end of the third day I was able to hobble about a little with the aid of a cane. That afternoon Sigmund came to me and asked if I would care to go with him to fill his little glass box. I refused, and he laughed. It was the last time I ever heard him laugh. I begged him to leave that stuff alone.
"Still laughing, he made some light reply and left me. I lay in my cot. I was filled with forebodings. The heat was intense, and I must have dropped off to sleep. I dreamed horrible, troublesome, weird dreams. I awoke, bathed in a cold sweat. I felt sure something was wrong, that some one was calling for me. I got to my feet and left my tent. No one was in sight. I tried to laugh at my premonition. I bitterly regretted that I had allowed my friend to override my persuasions.
"Hurrying as much as was possible, I started toward the clearing. My wound throbbed and ached. It tortured me. I seemed weighed down. Once I stumbled in my eagerness. It was horrible. Like a nightmare.
"I must have covered half the distance when I heard a scream. What a shriek it was! I wake up nights even now hearing it. It was unrecognizable. Like some unearthly animal. Just that one scream. My stick hindered me. I threw it away and ran.
"My blood was cold in my veins, but I felt not one twinge of pain in my foot. At last I came to the edge of the clearing. And there—God, it makes me sick even now to think of it."
THE SPEAKER paused; his face was chalky, and he shuddered and buried his face in his hands. I think he was crying.
Outside, the wind still howled, dully, monotonously, eerily. Sometimes it would shriek and scream. Then my friend's voice again—level, dead, cold.
"I looked out; I saw Sigmund standing on the sand. I can see him as plainly as though he were here now. His face was ashen. He was looking down. At his feet were the fragments of the glass box he had made.
