was adduced of his enmity and, though he had undoubtedly been born on the wrong side of the Border at Cranenburg, which is the Prussian frontier station on the Rotterdam-Cologne line, his name was undoubtedly van Heerden, which was Dutch. Change the "van" to "von," said the carping critics, and he was a Hun, and undoubtedly Germany was full of von Heerens and von Heerdens.
The doctor lived down criticism, lived down suspicion, and got together a remunerative practice. He had the largest flat in the building, one room of which was fitted up as a laboratory, for he had a passion for research. The mysterious murder of John Millinborn had given him a certain advertisement which had not been without its advantages. The fact that he had been in attendance on the millionaire had brought him a larger fame.
His theories as to how the murder had been committed by someone who had got through the open window whilst the two men were out of the room had been generally accepted, for the police had found footmarks on the flower-beds, over which the murderer must have passed. They had not, however, traced the seedy-looking personage whom Mr. Kitson had seen. This person had disappeared as mysteriously as he had arrived.
Three months after the murder the doctor stood on the steps of the broad entrance-hall which led to the flats, watching the stream of pedestrians passing. It was six o'clock in the evening and the streets were alive with shop-girls and workers on their way home from business.
He smoked a cigarette and his interest was, perhaps, more apparent than real. He had attended his last surgery case and the door of the "shop," with its sage-green windows, had been locked for the night.
His eyes wandered idly to the Oxford Street end of the thoroughfare, and suddenly he started. A girl was walking toward him. At this hour there was very little wheeled traffic, for Lattice Street is almost a cul-de-sac, and she had taken the middle of the road. She was dressed with that effective neatness which brings the wealthy and the work-girl to a baffling level, in a blue serge costume of severe cut; a plain white linen coat-collar and a small
