“There is one sure thing about it,” Havens went on, “and that is that if any hint regarding your proposed trip in quest of the murderers has by any chance become known to the friends of the crooks, the exact tactics shown this afternoon would be likely to be resorted to.”

“Yes,” Ben agreed, “it does seem that the first thing the crooks would do would be to prevent our departure for the Pacific Coast. A group of flying machine boys certainly represents a new element in secret service work! We must watch our machines after this!”

“If the fresh aviator really belongs to the crowd of crooks connected with the murderers,” Carl broke in, “we’ll hear from him again. He’ll follow us to the coast! He wouldn’t cease his efforts after chasing the Louise up New York bay.”

“He will have to chase us up if he continues his surveillance, for he won’t have long to spy on us here,” Jimmie declared. “We’re to leave for the Pacific coast day after to-morrow, as I understand it!”

“How about to-night?” asked Havens.

The boys sprang to their feet excitedly.

“To-night!” shouted Carl. “That will be fine!”

“That appears to me to be a good way of dodging trouble,” Ben acknowledged.

“I’d like to go to-night, all right,” Jimmie broke in, “but I’d like to form the acquaintance of that impudent aviator before I go!”

“I have an idea that you’ll meet him before you reach Monterey bay!” Havens replied. “You would know him again?” he asked.