We passed between two silent dynamos. The freezing-plant was already in operation, but George, the machinist, went off duty at six, after stopping the dynamos, and the temperature did not rise much during the night. It was very cold. The moisture on the brick walls had congealed to a thin film of ice, and a frosted network covered the ammonia pipes. Lazaroff stopped in front of a large wooden chest, with a glass door.

“In this very ordinary-looking icebox we keep our choicest specimens,” he said to Esther.

“Don’t open that!” I exclaimed.

He laughed disagreeably. “I had no intention of doing so,” he answered. “You applauded Sir Spofforth’s mediaeval vitalistic views tonight, Pennell, and the transition from the dream to the reality might prove too disturbing for your peace of mind. Dream on, by permission of those five missing centimeters. It is such an extinguisher of the soul theory to see parts of the organism flourishing in perfect health, all ready to work and grow, devoid of consciousness and brain attachments. We have two-fifths of a guinea-pig’s heart, Miss Esther, that is yearning to begin its pulsations as soon as it is placed in a suitable medium.”

He passed on. Esther’s fingers gripped my wrist tightly. “What an abominable man!” she whispered. “Arnold—my dear—to think I didn’t know my mind until an hour ago! When he asked me, something seemed to strip the mask from his face and the scales from my eyes. I hate him—but I’m afraid of him, Arnold.”

I drew her arm through mine and held her hand. Lazaroff preceded us down a flight of new concrete steps which had just dried. The cellar into which we descended had been used for storing packing-cases, and we had always gone down by a short ladder. It was here that the experiment was to be made. I had been shown nothing of Lazaroff’s preparations.

The cellar had been paved with concrete since my last visit, and I thought it looked smaller than formerly. As we went down we heard the monkeys begin to chatter. Lazaroff switched on a light. I saw a cage of guinea-pigs close at hand. They squealed and scurried among their straw. Two monkeys, awakened by the light, put their arms about each other and grimaced at me. A tiny marmoset stretched out its black, human-like arms between the bars appealingly. It looked very lonely and child-like as it blinked at us. What a terrific journey into the future Lazaroff, like some god, planned for that atom of flesh.

He stopped at the end of the cellar. I perceived now that the brick wall was new; it seemed to be an inner wall, bounding a partition; that was why the cellar looked smaller. The half-dried mortar clung flabbily to the interstices.

“Can you find the entrance, Arnold?” asked Lazaroff.

“The entrance?” The light was not strong, to be sure, but still it seemed impossible that there could be an ingress into that solid wall.