From up in the quarter where they knew the hangar must be, came loud cries of anger. Those who had planned to capture the seaplane when it was in prime condition for a flight to the German lines had evidently met with a most aggravating disappointment.

Suddenly the brilliant light vanished, shutting them in a pall of darkness that was all the more dense because of their having been staring into that illuminated avenue ahead, along which the seaplane was rushing at fair speed.

“It’s all clear in front, Billy,” Frank hastened to say, knowing that his companion must naturally think of the danger of a collision the first thing.

“Listen to ’em growl!” chuckled Billy, who had evidently been greatly amused as well as interested in the remarkable dash of the Sea Eagle. “But, after all, that was what I’d call a close shave, Frank. Didn’t you hear the door being smashed in as we started?”

“I thought I did,” replied the other, “but I knew that nothing up there could give us any trouble. The only chance of our being wrecked was for those on the inclined plane to place some obstruction on the track that would throw the wheels of our carriage off, and dump us in a heap below.”

“They didn’t want to wreck the seaplane, which was what saved us from that smashup,” ventured Billy, and then quickly adding: “Hello! shut her off, did you, Frank?”

The musical hum of the twin motors and the whir of the revolving propellers had suddenly ceased, though the boat still continued to move along the top of the little waves coming in from the Channel.

“Yes, we have gone far enough for the present,” replied the pilot.

They sat there for a little while, listening to the various sounds that reached their ears from the shore. Not far away the lights of Dunkirk could be seen, though these were by no means as brilliant as they might have been before the war broke out. This was on account of the fact that at any hour a raid from German aëroplanes might be expected in and around the encampment of the British troops.

“This is about the queerest situation we’ve ever found ourselves in, Frank,” ventured Billy presently, as he felt the boat moving up and down gently on the bosom of the sea. “It’s an experience we’ll never forget. I’m wondering what the next move on the program is going to be? How can we get ashore tonight in this terrible darkness?”