“She’s a Boston and Portland liner bound north,” declared Jack to Ned Nevins who, as the motor did not need any attention just then, stood at the young skipper’s side in the pilot house.

“How can you tell?”

“By her smokestack. Black with a white band.”

On came the steamer as the Electric Monarch swooped downward in a graceful curve to meet her. As the hydroaeroplane commenced her dive, there burst from the steamer’s whistle a jet of white smoke. Immediately after, the boys heard the booming greeting of the vessel’s siren.

Jack pressed the button that controlled the Electric Monarch’s siren and the next moment the hydroaeroplane was screeching an answering salute. They were now quite close to the steamer and could see her uniformed officers on the bridge and her decks black with passengers, their upturned faces looking like white discs.

“My! I’ll bet there’s a tall lot of speculation going on on board that craft right now,” said Ned, as the two boys gazed downward.

“I guess you’re right. It isn’t every day that the passengers of a liner have a chance to see a craft like this in action,” was the response.

Excitement did, indeed, appear to be rife on board the craft beneath them. Passengers could be seen clambering to all sorts of points of vantage. Handkerchiefs were frantically waved and the ship’s whistle was kept constantly roaring salutes.

Astern of the Electric Monarch fluttered the Stars and Stripes. Jack snatched up the speaking tube connecting with the stern lookout post. When Tom responded he ordered him to dip the colors in response to the steamer’s salutes.