No. 5, Kotze the physicist, said judiciously, “It is no more than adequate. But they will pass examination, a cursory examination. They are authentic doubloons and Reals of the early seventeenth century. Sea water has no great effect on gold and silver. I have used a little acid to pit them. They will of course have to be handed to the coroner and declared as treasure trove. It would need a far greater expert than he or the court to pass judgment on them. There will be no compulsion to reveal the location of the treasure. We could perhaps give the depth of water—ten fathoms let us say, and an unspecified reef. I see no means by which our story could be upset. There is often very deep water outside reefs. Miss Vitali could have had trouble with her aqualung and could have been seen disappearing over the deep shelf where our echo-sounder gave the depth as a hundred fathoms. We did our best to dissuade her from taking part in the search. But she was an expert swimmer. The romance of the occasion was too much for her.” No. 5 opened his hands. “There are often accidents of this nature. Many lives are lost in this way every year. A thorough search was instituted, but there were shark. The treasure hunt was broken off and we immediately returned to Nassau to report the tragedy.” No. 5 shook his head decisively. “I see no reason to be dismayed by this occurrence. But I am in favor of a most rigorous interrogation.” No. 5 turned his head politely in Largo’s direction. “There are certain uses of electricity of which I have knowledge. The human body cannot resist them. If I can be of any service . . .?” Largo’s voice was equally polite. They might have been discussing remedies for a seasick passenger. “Thank you. I have means of persuasion that I have found satisfactory in the past. But I shall certainly call upon you if the case is an obstinate one.” Largo looked down the table into the shadowed, ruby faces. “And now we will quickly run through the final details.” He glanced down at his watch. “It is midnight. There will be two hours’ moonlight starting at three a.m. The first light of dawn will be shortly after five a.m. We thus have two hours for the operation. Our course will bring us in towards West End from the south. This is a normal entry to the islands, and even if our further progress toward the target area is noted by the missile-station radar it will only be assumed that we are a yacht that has strayed slightly off course. We shall anchor at exactly three a.m. and the swimming party will leave for the half-mile swim to the laying point. The fifteen of you who will be taking part in this swim will, as arranged, swim in arrow formation, the Chariot and the sled with the missile in the center. Formation must be strictly kept to avoid straying. The blue torch on my back should be an adequate beacon, but if any man gets lost, he returns to the ship. Is that understood? The first duty of the escort will be to watch for shark and barracuda. I will again remind you that the range of your guns is not much more than twenty feet and that fish must be hit in or behind the head. Any man who is about to fire must warn his neighbor, who will then stand by to give additional fire if required. However, one hit should be sufficient to kill if the curare is, as we have been informed, not affected by the passage through sea water. Above all”—Largo put his hands decisively down on the table before him— “do not forget to remove the small protective sheath from the barb before firing.” Largo raised his hands. “You will forgive me for repeating these points. We have had many exercises in similar conditions and I have confidence that all will be well. But the underwater terrain will be unfamiliar and the effect of the dexedrine pills— they will be issued to the swimming party after this meeting—will be to sensitize the nervous system as well as provide the extra stamina and encouragement. So we must all be prepared for the unexpected and know how to handle it. Are there any further questions?”