“And there was someone rapping at the door. It was my landlord with threats and inquiries, an old Polish Jew in a long grey coat and greasy slippers. I had been tormenting a cat in the night, he was sure⁠—the old woman’s tongue had been busy. He insisted on knowing all about it. The laws in this country against vivisection were very severe⁠—he might be liable. I denied the cat. Then the vibration of the little gas engine could be felt all over the house, he said. That was true, certainly. He edged round me into the room, peering about over his German-silver spectacles, and a sudden dread came into my mind that he might carry away something of my secret. I tried to keep between him and the concentrating apparatus I had arranged, and that only made him more curious. What was I doing? Why was I always alone and secretive? Was it legal? Was it dangerous? I paid nothing but the usual rent. His had always been a most respectable house⁠—in a disreputable neighbourhood. Suddenly my temper gave way. I told him to get out. He began to protest, to jabber of his right of entry. In a moment I had him by the collar; something ripped, and he went spinning out into his own passage. I slammed and locked the door and sat down quivering.