Raymond had recovered from his first surprise. “All the same,” he remarked, “this discovery of yours, brilliant though it is (I’m quite sure I should never have thought of it), leaves the essential position unchanged. Mr. Ackroyd was alive at nine-thirty, since he was speaking into the dictaphone. It seems clear that the man Charles Kent was really off the premises by then. As to Ralph Paton⁠—?”

He hesitated, glancing at Ursula.

Her colour flared up, but she answered steadily enough.

“Ralph and I parted just before a quarter to ten. He never went near the house, I am sure of that. He had no intention of doing so. The last thing on earth he wanted was to face his stepfather. He would have flunked it badly.”