Fish darted before him, accompanied him. Off to his left, something big moved through the water. Carson turned a lamp in its direction, and the light passed through it. It was a jelly. Quite harmless. It rippled, blossomed, and swam leisurely on its way.

A broad colonnade masked the front of the Temple. They settled onto the stone floor, beside a circular column. It was one of ten still standing. Of an original twelve. Not bad, for a place that had been through an earthquake.

"Frank." Linda's voice broke in on his earphones. She sounded pleased. And with good reason; she had planned this aspect of the excavation. She'd taken a couple of chances, guessed right, and they'd broken in well ahead of schedule. Under the circumstances, the time gained was critical.

"Henry's with me," said Carson. "We're on our way."

"Henry," she said. "We're open as far back as we can see."

"Good show, Linda. Congratulations."

The Temple entrance gaped wide. They swam into the nave. Lines of colored lights trailed off through the dark. It always seemed to Henry that the lamps exaggerated the size of the place.

"Blue," said Carson.

"I know." They followed the blue lamps toward the rear. Only vestiges of the Temple roof remained. The gray light from the surface was oily and thick against the cheerful glow of the markers.

Henry was in poor condition. Swimming tired him, but he had declared jets too dangerous to use inside the excavation. He had to live by his own rules.

The glowing blue track angled abruptly off to the left, and plunged through a hole in the floor.

He could hear Linda and Art Gibbs and some of the others on the common channel. They were laughing and cheering him on and congratulating one another on the find.

He swam down the labyrinthine approach tunnel. Carson stayed to his rear, advising him to take his time, until Henry finally lost patience and asked him to be quiet. He rounded the last bend and saw lights ahead.