Scotland Yard, curious, suspicious, sought out the Three Just Men. They had alibis so complete as to be unbreakable. Sven Gurther went unavenged—but he kept from the tow-path thereafter.
In this house of his there were rooms which only Dr. Oberzohn visited. The Danish maid complained to the cook that when she had passed the door of one as the doctor came out, a blast of warm, tainted air had rushed out and made her cough for an hour. There was another room in which from time to time the doctor had installed a hotchpotch of apparatus. Vulcanizing machines, electrical machines (older and more used than Mirabelle had seen in her brief stay in the City Road), a liquid air plant, not the most up-to-date but serviceable.
He was not, curiously enough, a doctor in the medical sense. He was not even a doctor of chemistry. His doctorate was in Literature and Law. These experiments of his were hobbies—hobbies that he had pursued from his childhood.
On this evening he was sitting in his stuffy parlour reading a close-printed and closer-reasoned volume of German philosophy, and thinking of something else. Though the sun had only just set, the blinds and curtains were drawn; a wood fire crackled in the grate, and the bright lights of three half-watt lamps made glaring radiance.
An interruption came in the shape of a telephone call. He listened, grunting replies.
“So!” he said at last, and spoke a dozen words in his strange English.
Putting aside his book, he hobbled in his velvet slippers across the room and pressed twice upon the bell-push by the side of the fire-place. Gurther came in noiselessly and stood waiting.
He was grimy, unshaven. The pointed chin and short upper lip were blue. The V of his shirt visible above the waistcoat was soiled and almost black at the edges. He stood at attention, smiling vacantly, his eyes fixed at a point above the doctor’s head.
Dr. Oberzohn lifted his eyes from his book.
“I wish you to be a gentleman of club manner to-night,” he said. He spoke in that hard North-German tongue which the Swede so readily acquires.