"Exactly so," said Biggs. "By the way, Denver still refuses to explain his movements, I suppose?"

"Cat-e-gori-cally," replied the solicitor. "The Wimseys are a very determined family," he added, "and I fear that, for the present, it is useless to pursue that line of investigation. If we could discover the truth in some other way, and confront the Duke with it, he might then be persuaded to add his confirmation."

"Well, now," said Parker, "we have, as it seems to me, still three lines to go upon. First, we must try to establish the Duke's alibi from external sources. Secondly, we can examine the evidence afresh with a view to finding the real murderer. And thirdly, the Paris police may give us some light upon Cathcart's past history."

"And I fancy I know where to go next for information on the second point," said Wimsey suddenly. "Grider's Hole."

"Whew-w!" Parker whistled. "I was forgetting that. That's where that bloodthirsty farmer fellow lives, isn't it, who set the dogs on you?"

"With the remarkable wife. Yes. See here, how does this strike you? This fellow is ferociously jealous of his wife, and inclined to suspect every man who comes near her. When I went up there that day, and mentioned that a friend of mine might have been hanging about there the previous week, he got frightfully excited and threatened to have the fellow's blood. Seemed to know who I was referrin' to. Now, of course, with my mind full of No. 10—Goyles, you know—I never thought but what he was the man. But supposin' it was Cathcart? You see, we know now, Goyles hadn't even been in the neighborhood til the Wednesday, so you wouldn't expect what's-his-name—Grimethorpe—to know about him, but Cathcart might have wandered over to Grider's Hole any day and been seen. And look here! Here's another thing that fits in. When I went up there Mrs. Grimethorpe evidently mistook me for somebody she knew, and hurried down to warn me off. Well, of course, I've been thinkin' all the time she must have seen my old cap and Burberry from the window and mistaken me for Goyles, but, now I come to think of it, I told the kid who came to the door that I was from Riddlesdale Lodge. If the child told her mother, she must have thought it was Cathcart."

"No, no, Wimsey, that won't do," put in Parker; "she must have known Cathcart was dead by that time."

"Oh, damn it! Yes, I suppose she must. Unless that surly old devil kept the news from her. By Jove! that's just what he would do if he'd killed Cathcart himself. He'd never say a word to her—and I don't suppose he would let her look at a paper, even if they take one in. It's a primitive sort of place."

"But didn't you say Grimethorpe had an alibi?"

"Yes, but we didn't really test it."