“We’ll never overtake him now,” Sara said despairingly. “That boat is a fast one.”

A slower craft, one the girl had used earlier in the evening to cross the river, was beached nearby. Even though pursuit seemed useless, the men launched it. Overloaded with five passengers, the boat made slow progress against the current.

“We haven’t a chance to overtake that fellow,” Sara repeated again.

“If only we could notify Coast Guards!” Penny murmured hopelessly. “Their station is up river. They still might be able to intercept Wessler before he reaches the bridge.”

“No way to contact them,” Mr. Parker responded, his voice grim. “If there were any houses along shore, we could telephone. As it is, the situation is pretty hopeless.”

“Shall we give up the chase?” asked Sara who handled the tiller.

As Mr. Parker hesitated, Penny suddenly grasped his arm. To the starboard she had glimpsed an approaching yacht. Its contour was so well known along the waterfront that she had no doubt as to its identity—the Eloise III.

“Dad, we still have a chance!” she cried. “By radio telephone!”

“How d’you mean?” he demanded.

“The Eloise has a radio telephone!” Penny explained. Excitedly, she began to signal with Sara’s flashlight. “Dad, if only they see us in time, we still may save the bridge!”