Arthur splashed over to it. On closer inspection, it was clearly a buoy or some floating marker, totally covered in green weeds. Arthur reached out to touch it. A huge strand of green weeds came away in his hand, revealing a bright red surface beneath.
Arthur touched that. It felt slightly sticky, and some of the red stuff came away on his hand. It was like chewing gum, impossible to get off. Arthur crossly wiped his hands but that only smeared it across his fingers, and his head dipped under. His broken leg wasn’t weighed down that much by the cast, but he couldn’t bend his knee and he couldn’t tread water well enough just with one leg to really try and clean his hands, since he had to make swimming motions as well.
Arthur started to clear the weeds away with one hand. While doing that, he noticed that the buoy didn’t move far with the swell. Each time one of the bigger waves came past, it swept Arthur five or six yards away and he had to swim back. The buoy didn’t move anywhere near as much.
It had to be fixed to something. Arthur duck-dived down and, sure enough, a barnacle-encrusted chain led down from the buoy, down through the sunlit water and into the dark depths.
He resumed cleaning the weeds away with new enthusiasm and so got a lot more of the sticky stuff on his hands. It was tar, or something like tar, though it didn’t smell.
The buoy has to mark something, Arthur thought. It must be used by someone, who’ll come past. I might even be able to climb up on it.
When the buoy was almost clean it rode much higher in the water. Arthur had hoped he might find some handles on it, or projections he could hold on to, because he was getting very tired. But there weren’t any. The only part of the buoy that was of any interest was a small brass ring right near the top. Arthur could only just reach it.
The ring was about the size of the top joint of Arthur’s little finger, far too small for him to hold on. It also felt a bit loose. Arthur gave it a pull, hoping that it might come out and he could somehow make the hole bigger to create a handhold.
It came out with a very loud popping sound, followed immediately afterwards by a ten-foot-high shower of sparks and a loud ticking noise as if a large and noisy clock had started up deep within the ball.
Arthur started frantically backstroking away from it, his body almost reacting faster than his brain, which had rapidly processed the fact that this floating ball was some sort of floating bomb — a mine — and it was going to explode.
A few seconds later, with Arthur only ten yards away, the buoy did explode. But it was not the lethal blast Arthur feared. There was a bright flash, and a rush of air above Arthur’s head, but no deadly rain of fragments.
Smoke poured out of the ball, dark black smoke that coiled up into the air in a very orderly fashion, quite unlike any smoke Arthur had seen before. It started to whip about like a snake, dancing all over the place. Eventually its ‘head’ connected with its ‘tail’ to form a giant smoke ring that hovered ten feet above the buoy, which was still intact, though its upper half had broken open into multiple segments like a lotus.
The smoke ring slowly closed in on itself to become an inky cloud that spun about for a minute or so, then it abruptly burst apart, turning into eight jet-black seabirds that shrieked ‘Thief!’ above Arthur’s head before they each flew off in a different direction, covering the eight points of the compass rose.
Arthur was too tired to worry about what the seabirds were doing, or who they might be alerting. All he cared about was the fact that now the top half of the buoy was open, he could pull himself up on it and have a rest.
Arthur had only just enough energy to drag himself over and into the buoy. It was full of water, but he could sit in it quite comfortably and rest. That was all he wanted to do for a while. Rest.
But after only twenty minutes, according to his still-backwards but otherwise reliable and waterproof watch, Arthur found that he had rested enough. Though there was still no visible sun, it felt like one was beating down on him. He was really hot, and he was sure he was getting sunburned and that his tongue had started to swell from lack of water. He wished he’d managed to keep a sheet from the bed to use as a sunshade. He took his dressing gown off and made that into a makeshift turban, but it didn’t really help.
At that point, Arthur started to hope that whoever the birds were supposed to alert would show up. Even if they thought he was a thief. That implied there was something to steal here, which didn’t seem to be the case. The buoy was just a big, empty, floating ball with the top hemisphere opened up. There was nothing inside it except Arthur.
Another baking, uncomfortable hour passed. Arthur’s broken leg began to ache again, probably because the painkillers he’d had in the hospital were wearing off. The high-tech cast didn’t seem to be operational anymore and Arthur could see distinct holes in it now.