"The only thing about the sergeant I know," he said, "I have already told the chief constable who sat in that very chair," he explained. "He was always a bit of a mystery--the sergeant, I mean. When he was 'tanked,' if I may use the expression, he would tell you stories by the hour, but when he was sober you couldn't get a word out of him. His daughter only lived with him for about a fortnight." "His daughter!" said Mr. Mann quickly. "He had a daughter, as I've already notified my superiors," said Constable Wiseman gravely. "Rather a pretty girl. I never saw much of her, but she was in Eastbourne off and on for about a fortnight after the sergeant came. Funny thing, I happen to know the day he arrived, because the wheel of his fly came off on my beat, and I noticed the circumstances according to law and reported the same. I don't even know if she was living with him. He had a cottage down at Birlham Gap, and that is where I saw her. Yes, she was a pretty girl," he said reminiscently; "one of the slim and slender kind, very dark and with a complexion like milk. But they never found her," he said. Again Mr. Mann interrupted. "You mean the police?" Constable Wiseman shook his head. "Oh, no," he said; "they've been looking for her for years; long before Mr. Minute was killed." "Who are 'they'?" "Well, several people," said the constable slowly. "I happen to know that Mr. Cole wanted to find out where she was. But then he didn't start searching until weeks after she disappeared. It is very rum," mused Constable Wiseman, "the way Mr. Cole went about it. He didn't come straight to us and ask our assistance, but he had a lot of private detectives nosing round Eastbourne; one of 'em happened to be a cousin of my wife's. So we got to know about it. Cole spent a lot of money trying to trace her, and so did Mr. Minute." Saul Arthur Mann saw a faint gleam of daylight. "Mr. Minute, too?" he asked. "Was he working with Mr. Cole?" "So far as I can find out, they were both working independent of the other--Mr. Cole and Mr. Minute," explained Mr. Wiseman. "It is what I call a mystery within a mystery, and it has never been properly cleared up. I thought something was coming out about it at the trial, but you know what a mess the lawyers made of it." It was Constable Wiseman's firm conviction that Frank Merrill had escaped through the incompetence of the crown authorities, and there were moments in his domestic circle when he was bitter and even insubordinate on the subject. "You still think Mr. Merrill was guilty?" asked Saul Arthur Mann as he took his leave of the other. "I am as sure of it as I am that I am standing here," said the constable, not without a certain pride in the consistency of his view. "Didn't I go into the room? Wasn't he there with the deceased? Wasn't his revolver found? Hadn't there been some jiggery-pokery with his books in London?" Saul Arthur Mann smiled.