The tall black man stuck his handgun into his waistband, then reached into his pocket. "Since the two of you are on such affectionate terms," he said, pulling out a silver key, "let’s make it official." He unlocked the manacle from his right wrist, then peeled Yuxia’s left arm away from Zula’s waist and snapped it onto her. The two women were now joined at their left wrists, which, as they immediately discovered, meant that they couldn’t face in the same direction. If one of them walked forward, the other had to walk backward, or else they had to do something awkward with their arms, and move shoulder to shoulder. Their captor understood this very well. Seizing the manacle’s chain with one hand, he towed them aft, around the side of the pilothouse, to an open space on the stern that was shaded under a canvas awning. Rummaging around in a toolbox, he produced a hammer and a large nail. He drove the nail about halfway into a deck plank, then dragged them over, forced them down, pressed the chain to the deck right next to the nail, and pounded on the nail until it had been bent over the chain and its bowed head driven deeply into the wood.