"Masters," he said, "we're not finished yet But if we play the cards light we'll finish soon. Masters, we've got the swine good and proper."

And the tone of his voice stung Martin Drake like a red-hot wire.

"We've got a beauty," said H.M., envisaging the murderer. "What sticks in my gorge," he tugged-at his collar, "is that Puckston gal being killed just merely for the reason she was killed. Masters, we've got a real vicious ‘un. And, oh, so innocent!"

"Sir Henry! Listen!"

"Hey?"

"I knew you'd twigged it" Masters said with satisfaction, "as soon as you shouted out to let you think, and then rushed off to the roof. But what have you got?"

"I know how Sir George Fleet was murdered."

Masters reached for his notebook.

"And don't you forget that," said H.M., pointing a finger malevolently, "because it's the keystone of the whole business. Everything falls down without it" And, Martin noted with disquiet, H.M.'s face was still pale.

"I won’t forget" Masters assured him. "And—?"