It wasn't a pleasant thought to dwell on. Toshio was glad when Brookida drifted alongside the sled.

"Why did Hikahi have me come up to the surface?" he asked the elderly dolphin. "I thought I was to stay out of sight below in case there were already spy-sats overhead."

Brookida sighed. "I suppose she thinkss you need a break. Besides, who could spot as small a machine as the ssled, with so much metal around?"

Toshio shrugged. "Well, it was nice of Hikahi, anyway. I did need the rest."

Brookida rose up in the water, balancing upon a series of churning tail-strokes. "I hear Hikahi," he announced. "And here she isss."

Two dolphins came in fast from the north, one light gray in appearance, the other dark and mottled. Through his headphones Toshio could hear the voice of the party leader.

* Flame-fluked I — Hikahi call you *

* Dorsal listening — ventral doing *

* Laugh at my word — but first obey them *

* Gather at the sled — and listen! *

Hikahi and Ssattatta circled the rest of the party once, then came to rest in front of the assembled expedition.

Among mankind's gifts to the neo-dolphin had been an expanded repertoire of facial expression. A mere five hundred years of genetic engineering could not do for the porpoise what a million years of evolution had done for man. Fins still expressed most of their feelings in sound and motion. But they were no longer frozen in what humans had taken (in some degree of truth) to be a grin of perpetual amusement. Fins were capable now of looking worried. Toshio might have chosen Hikahi's present expression as a classic example of dolphin chagrin.

"Phip-pit has disappeared," Hikahi announced.

"I heard him cry out, over to the south of me, then nothing. He was searching for Ssassia, who disappeared earlier in the same direction. We will forego mapping and metals search to go and find them. All will be issued weaponss."