“Who’s the other?” said Mr. Hoopdriver, calmly, but controlling with enormous internal tension his self-appreciation. “Who’s the other?” was really brilliant, he thought. “There’s my wife and _her_ stepmother.” “And you want to know which it is?” “Yes,” said Bechamel. “Well—arst ’em!” said Mr. Hoopdriver, his exultation getting the better of him, and with a pretty consciousness of repartee. “Arst ’em both.” Bechamel turned impatiently. Then he made a last effort. “I’d give a five-pound note to know just the precise state of affairs,” he said. “I told you to stow that,” said Mr. Hoopdriver, in a threatening tone. And added with perfect truth and a magnificent mystery, “You don’t quite understand who you’re dealing with. But you will!” He spoke with such conviction that he half believed that that defective office of his in London—Baker Street, in fact—really existed. With that the interview terminated. Bechamel went back to the Angel, perturbed. “Hang detectives!” It wasn’t the kind of thing he had anticipated at all. Hoopdriver, with round eyes and a wondering smile, walked down to where the mill waters glittered in the moonlight, and after meditating over the parapet of the bridge for a space, with occasional murmurs of, “Private Inquiry” and the like, returned, with mystery even in his paces, towards the town. XVIII. That glee which finds expression in raised eyebrows and long, low whistling noises was upon Mr. Hoopdriver. For a space he forgot the tears of the Young Lady in Grey. Here was a new game!—and a real one. Mr. Hoopdriver as a Private Inquiry Agent, a Sherlock Holmes in fact, keeping these two people ‘under observation.’ He walked slowly back from the bridge until he was opposite the Angel, and stood for ten minutes, perhaps, contemplating that establishment and enjoying all the strange sensations of being this wonderful, this mysterious and terrible thing. Everything fell into place in his scheme. He had, of course, by a kind of instinct, assumed the disguise of a cyclist, picked up the first old crock he came across as a means of pursuit. ‘No expense was to be spared.’ Then he tried to understand what it was in particular that he was observing. “My wife”—“_Her_ stepmother!” Then he remembered her swimming eyes. Abruptly came a wave of anger that surprised him, washed away the detective superstructure, and left him plain Mr. Hoopdriver. This man in brown, with his confident manner, and his proffered half sovereign (damn him!) was up to no good, else why should he object to being watched? He was married! She was not his sister. He began to understand. A horrible suspicion of the state of affairs came into Mr. Hoopdriver’s head. Surely it had not come to _that_. He was a detective!—he would find out. How was it to be done? He began to submit sketches on approval to himself. It required an effort before he could walk into the Angel bar. “A lemonade and bitter, please,” said Mr. Hoopdriver.