Ashore, a man came out of the fancy frogmen's house and walked down to the beach. He shaded his eyes and stared at the Water Witch. Rick pointed him out to Tony.
"This business stumps me," the archaeologist admitted. "Are you certain about the identity of the man who was trailing Ames?"
"We're dead sure."
"Then is there any possible way he could have known about our presence on the island?"
"Not unless he recognized the Water Witch."
"That must be it. The question is, what do we do about it?"
"Nothing, I guess. Except to be on our guard."
Twin sets of bubbles rose, some distance from the boat, showing that both lungs were working well twenty fathoms down. Since the bubbles did not ascend vertically, they did not show the location of the two on the bottom. Rick studied them, working on an idea.
The chicken had dropped pretty close to them. But since their floats were tied to the reef, and their bubbles were carried off a vertical path by the light currents, neither could have been used to pinpoint their whereabouts—unless whoever dropped the chicken had an excellent knowledge of the currents in this particular place!
He carried the thought further. The shadow had gotten upset because he and Scotty had gone swimming in an area where something was hidden. At least, that was a reasonable assumption, based on the events at St. Thomas. The fancy diving gear in the house, the attempt to warn them off, and the presence of Steve's erstwhile shadow on Clipper Cay could then be added up.