"It is twenty days now since Katrina and I have been united. She does not interfere with my work as much as I feared. She even lets me talk chemistry to her, though I am sure she understands not one word of what I tell her. I think I have made a good selection and it is surely a permanent one. Therefore I must work harder than ever or I shall not get on." This alarmed me. Yet, if Armstadt had married he made very little fuss about it. Evidently it concerned him chiefly in relation to his work. But whoever and whatever Katrina was, it was clear that her presence would be disastrous to my plans of assuming his place in the German world. Pondering over the ultimate difficulty of my situation, but with a growing faith in the plan I had evolved for avoiding immediate explanations, I fell into a long-postponed sleep. The last thing I remember was tumbling from my chair and sprawling out upon the floor where I managed to snap out my light before the much needed sleep quite overcame me. ~3~ I was awakened by voices, and opened my eyes to find the place brightly lighted. I closed them again quickly as some one approached and prodded me with the toe of his boot. "Here is a man alive," said a voice above me. "He is Captain Armstadt, the chemist," said another voice, approaching; "this is good. We have special orders to search for him." The newcomer bent over and felt my heart. I was quite aware that it was functioning normally. He shook me and called me by name. After repeated shakings I opened my eyes and stared at him blankly, but I said nothing. Presently he left me and returned with a stretcher. I lay inertly as I was placed thereon and borne out of the chamber. Other stretcher-bearers were walking ahead. We passed through the engine room where mechanics were at work on the damaged liquid air engine. My stretcher was placed on a little car which moved swiftly along the tunnel. We came into a large subterranean station and I was removed and brought before a bevy of white garbed physicians. They looked at my identification folder and then examined me. Through it all I lay limp and as near lifeless as I could simulate, and they succeeded in getting no speech out of me. The final orders were to forward me post haste to the Imperial Hospital for Complex Gas Cases. After an eventless journey of many hours I was again unloaded and transferred to an elevator. For several hundred metres we sped upward through a shaft, while about us whistled a blast of cold, crisp air. At last the elevator stopped and I was carried out to an ambulance that stood waiting in a brilliantly lighted passage arched over with grey concrete. I was no longer beneath the surface of the earth but was somewhere in the massive concrete structure of the City of Berlin. After a short journey our ambulance stopped and attendants came out and carried my litter through an open doorway and down a long hall into the spacious ward of a hospital.