"I forgot. It's one she wore on the boat—and that day at your house—Miss Ray, I mean. She told me about it; said it had been a present from Ben Halim to her sister, who gave it to her."

"Sure you couldn't mistake it? There's a strong family likeness in Arab jewellery."

"I'm sure. And even if I hadn't been at first, I should be now, from that chap's whisking it off the instant he set eyes on me. His having it proves a lot. As she wore the thing at your house, he must have got it somehow after we saw her. Jove, Nevill, I'd like to choke him!"

"If you did, he couldn't tell what he knows."

"I'm going to find out somehow. Come along, no use wasting time here now, trying to get vague information out of Arab chiefs. We can learn more by seeing where this brute lives, than by catechizing a hundred caïds."

"It's too late for him to get away from Algiers to-night by train, anyhow," said Nevill. "Nothing goes anywhere in particular. And look here, Legs, if he's really onto us, he won't have made himself scarce without leaving some pal he can trust, to see what we're up to."

"There were two men close behind who might have been with him," Stephen remembered aloud.

"Would you recognize them?"

"I—think so. One of the two, anyhow. Very dark, hook-nosed, middle-aged chap, pitted with smallpox."

"Then you may be sure he's chosen the less noticeable one. No good our trying to find Maïeddine himself, if he's left the palace; though I hope, by putting our heads and Roslin's together, that among the three of us we shall pick him up later. But if he's left somebody here to keep an eye on us, our best course is to keep an eye on that somebody. They'll have to communicate."