"I smelled a rat when I searched the Queen Artemisia. The transmitter in the radio cabin was set on the same frequency as the set in your office. I must confess, at the time I thought it might be any one of you. The field narrowed down to Darius after I swam ashore and met Giordino. He said that Darius had been stationed on your radio during the entire time between the arrival and departure of the Queen Artemisia. It was a cozy arrangement. While you and Zeno were on a wild-goose chase, keeping an eye on the villa and battling mosquitos, Darius was comfortably sipping his Metaxa and notifying Heibert of your every move. That's why I had the ship all to myself. The crew members were all busy down in the bilges, releasing the sub. The captain hadn't bothered posting a lookout because Darius had assured him all was clear. What Darius didn't know, and even you didn't know, Zac, was that I intended to swim out and scout the ship from the water. You suspected nothing when Giordino and I volunteered to watch the ship from the beach. It was only at the last minute, when I saw no sign of the Queen Artemisia's crew, that I decided to sneak on board for a closer look. My apologies for not clearing my actions with you, but I was certain that you'd have raised hell and tried to stop me."

"I'm the one who should offer apologies," Zacynthus said. "I deserve the dunce award of the year. God, how could I have been so blind? I should have guessed something was wrong when Darius was never able to intercept any messages between the passing Minerva ships and the villa."

"I could have relayed my suspicious to you on the road this morning," Pitt said. "But it hardly seemed the right time or place, particularly in front of Darius. Secondly, without one hundred percent proof I doubt seriously whether you or Zeno would have believed my accusation."

"You were quite right," Zacynthus admitted. "Tell me this. Where did you find out about the Queen Jocasta?"

"The Air Force has a funny habit about loaning out their vehicles; sooner or later they want them back. After Giordino and I left you, we stopped off at Brady Field and returned the truck to the motorpool. Colonel Lewis was waiting for us. It was he who alerted me to the Queen Jocasta. One of his morning patrols sighted her cruising north toward Thasos. The next step was to check the ship's cargo and destination with the Minerva Lines' agent in Athens. His reply added to an interesting coincidence. Not only were two Minerva ships passing by the villa within twelve hours of each other, but both were headed for ports in the United States. I began to get the picture—von Till, or rather Heibert, intended to switch the sub and the heroin from the Queen Artemisia to the Queen Jocasta."