A shrill whistle was heard, evidently a signal to those in the second boat to inform them that the object of their search had been discovered. Then came the cheery whirr of the motors, accompanied by the churn of the busy propellers, and like a giant, double-winged dragonfly, the seaplane started along the surface of the water, followed by another burst of angry shouts.
“Duck! they may be going to shoot!” exclaimed Frank, suiting his actions to his own words.
That was just what did happen, for a volley of shots sounded, and had the motors not been making so much noise the boys might have heard the whistle of the passing leaden messengers.
There was no harm done, for, unable to longer see the speeding seaplane, those who used their weapons with such reckless abandon had to fire at random. Skimming the water like an aquatic bird, with a gradual but rapid increase to their speed, the seaplane soon began to rise.
Billy realized from that that Frank meant to make an ascension, possibly deeming it wise to get away from such a dangerous neighborhood as quickly as possible. And, as they anticipated, the reliable Sea Eagle was doing her prettiest when called upon to show her fine points.
Once free from the sea, they rose until Frank felt sure of his position. He had switched on the electric searchlight, and the storage battery was of sufficient power to send the ray of white light far ahead. It could be turned to any quarter of the compass.
“Well, here we are off on our trial trip sooner than we expected,” said Billy, meaning to draw the other out, for he was consumed by curiosity to know what was coming next.
“Two narrow squeaks on one night ought to be enough, don’t you think, Billy?” asked the pilot, as he started out into that avenue of light, and then glanced at the handy compass so as to fix their course on his mind.
“Well, we’ve been pretty lucky so far,” admitted the other. “It wouldn’t pay to keep up that sort of racket. They say, you know, that the pitcher may go to the well just once too often. It might be three times and out for us.”
“And neither of us feels like accommodating those anxious German secret agents whose one business in Dunkirk is to steal our thunder, do we, Billy?”