“I’m hot and tired,” remarked Teddy, after they had eaten dinner, “and I’m going in for a swim before I start in again.”
A moment later he was in the water and the others were not long in following his example. All were good swimmers and they sported about indulging in all sorts of fancy practices.
“How far can you fetch under water, Teddy?” called out Bill.
“Watch me,” said Teddy, drawing in a long breath and plunging beneath the surface.
He swam with all the vigor of his sturdy young arms, helped by the current that was running strongly with him. He stayed under until his lungs felt as though they were bursting and he was forced to come up.
He was astonished to find himself in an atmosphere 238 of twilight instead of the brilliant sunshine he expected. His first thought was that the sun had gone under a cloud. He shook the water from his eyes and looked up.
He could see neither sun nor sky!
For a moment panic seized him. Then he pulled himself together. He could hear the shouts of his companions, alarmed because they had not seen him come up.
“I’m all right,” he shouted, to quiet their fears. Then he looked around him and realized what had happened.
He had passed under a projecting shelf of rock into what seemed to be a cave. The water was shallow and he found that he could stand on the sandy bottom.