The girl's hand went to her mouth; then it went up in a kind of wave. For a moment the Saint was perplexed; and then he started to turn. She was looking at something over his shoulder, but his head had not revolved far enough to see what it was before the solid weight of a sandbag slugged viciously into the back of his neck. He had one instant of feeling his limbs sagging powerlessly under him, while the book he carried dropped from his hand and sprawled open to the ground; and then everything went dark.
He came back to earth in a small barely-furnished office overlooking the landing-field, and in the face that was bending over him he recognized the round pink countenance of Chief Inspector Teal, of Scotland Yard.
"Were you the author of that clout?" he demanded, rubbing the base of his skull tenderly. "I didn't think you could be so rough."
"I didn't do it," said the detective shortly. "But we've got the man who did-if you want to charge him. I thought you'd have known Kate Allfield, Saint."
Simon looked at him.
"What-not 'the Mug'? I have heard of her, but this is the first time we've met. And she nearly made me smoke a sleepy cigarette!" He grimaced. "What was the idea?"
"That's what we're waiting for you to tell us," said Teal grimly. "We drove in just as they knocked you out. We know what they were after all right-the Deacon's gang beat them to the necklace, but that wouldn't make the Green Cross bunch give up. What I want to know is when you started working with the Deacon."
"This is right over my head," said the Saint, just as bluntly. "Who is this Deacon, and who the hell are the Green Cross bunch?"
Teal faced him calmly.
"The Green Cross bunch are the ones that slugged you. The Deacon is the head of the gang that got away with the Palfrey jewels yesterday. He came to see you twice yesterday afternoon -we got the wire that he was planning a big job and we were keeping him under observation, but the jewels weren't missed till this morning. Now I'll hear what you've got to say; but before you begin I'd better warn you --"
"Wait a minute." Simon took out his cigarette-case and helped himself to a smoke. "With an unfortunate reputation like mine, I expect it'll take me some time to drive it into your head that I don't know a thing about the Deacon. He came to me yesterday and said he was a solicitor-he wanted me to look after a valuable sealed packet that he was sending over to Paris, and I took on the job. That's all. He wouldn't even tell me what was in it."
"Oh, yes?" The detective was dangerously polite. "Then I suppose it'd give you the surprise of your life if I told you that that package you were carrying contained a diamond necklace valued at about eight thousand pounds."
"It would," said the Saint.
Teal turned.
There was a plain-clothes man standing guard by the door, and on the table in the middle of the room was a litter of brown paper and tissue in the midst of which gleamed a small heap of coruscating stones and shining metal. Teal put a hand to the heap of jewels and lifted it up into a streamer of iridescent fire.
"This is it," he said.
"May I have a look at it?" said the Saint.
He took the necklace from Teal's hand and studied it closely under the light. Then he handed it back with a brief grin.
"If you could get eighty pounds for it, you'd be lucky," he said. "It's a very good imitation, but I'm afraid the stones are only jargoons."
The detective's eyes went wide. Then he snatched the necklace and examined it himself.
He turned around again slowly.
"I'll begin to believe you were telling the truth for once, Templar," he said, and his manner had changed so much that the effect would have been comical without the back-handed apology. "What do you make of it?"
"I think we've both been had," said the Saint. "After what you've told me, I should think the Deacon knew you were watching him, and knew he'd have to get the jewels out of the country in a hurry. He could probably fence most of them quickly, but no one would touch that necklace-it's too well known. He had the rather artistic idea of trying to get me to do the job --"
"Then why should he give you a fake?"
Simon shrugged.
"Maybe that Deacon is smoother than any of us thought. My God, Teal-think of it! Suppose even all this was just a blind-for you to know he'd been to see me-for you to get after me as soon as the jewels were missed-hear I'd left for Paris-chase me to Croydon-and all the time the real necklace is slipping out by another route --"
"God damn!" said Chief Inspector Teal, and launched himself at the telephone with surprising speed for such a portly and lethargic man.
The plain-clothes man at the door stood aside almost respectfully for the Saint to pass.