Rick spoke up. "But, Ben, numbered bills are like a flag! No one can spend them without getting caught."
"That is true, Rick, when something illegal is involved. Had the collector kept his mouth shut, no one would have known any illegality was involved in the transaction."
"But you can't use American money in Cairo," Scotty objected. "It has to be changed."
"Right, Scotty. The problem was this: the revolutionaries could not convert their dollars to Egyptian pounds in America. It would have attracted too much attention, because only a few banks and finance houses can handle such amounts, and then only in co-operation with the government. Their best bet was to get the dollars into the Arab countries. We can watch international traffic, but local traffic among the Arab nations is hard to control. They would have sent the dollars to another country to be changed."
"An Arab country?" Rick asked.
"Probably. The borders between the Republic and its neighbors are desert, impossible to patrol. The dollars could have been sent, then gradually converted into Egyptian currency. Dollars sell readily in this part of the world, and sometimes not too many questions are asked."
"I get the picture," Rick stated. "The Moustafas stole the necklace, and smuggled it to America. Bartouki sold it to the collector, through an American helper. Then he had the money sealed in the cat. He handed it to me, because my sister gave him an opening and I fell into it. Meanwhile, you put Ali in jail, then Fuad. Youssef got into the act through the clerk. So then we had Kemel Moustafa and Youssef on our trail. Why didn't you put Kemel in jail, too? And how about Bartouki?"
"We had no evidence that would stand up in court against Kemel, although we were convinced he was in the act with his brothers. That's why I waited until he tried to take the cat by force."
Rick exploded, "You used us and the cat for bait!"
"It worked," Ben pointed out mildly. "We got both Youssef and Moustafa, although the trap was only for Kemel. And you were never in any real danger, except for a stray bullet. I've been in the unfinished barracks with my men since noontime. The senior scientists knew it. That's why they were willing to leave you alone. Two of my men mingled with Youssef's gang as soon as they arrived, and weren't detected. Any sign of real danger to you and they'd have bailed you out fast. But we were holding off, because I had a radio message that Kemel was on his way with a gang of his own."