above the water, bend her head forward, straighten out her arms and lock the hands to form the arch before her head, and, so shifting the balance of her body, change it from the horizontal to the perfect, water-cleaving angle.

The moment she entered the water, he swung out on the thirty-foot platform and waited. From this height he could make out her body beneath the surface swimming a full stroke straight for the far end of the tank. Not till then did he dive. He was confident that he could outspeed her, and his dive, far and flat, entered him in the water twenty feet beyond her entrance.

But at the instant he was in, Dick dipped two flat rocks into the water and struck them together. This was the signal for Paula to change her course. Graham heard the concussion and wondered.