Although Perry was no mechanician, he quite understood the operation of an electric horn, and now, swinging nimbly down to the bridge deck, he set the palm of his hand against a big black button.

The result was all that he desired.

An amazing, ear-splitting shriek broke the ordinary clamour of the scene.
Perry smiled ecstatically and peered out and up from under the awning.
But the half-dozen countenances that looked down at him expressed only disgust, and Joe's voice came to him even above the blast of the horn.
"Don't be a silly fool, Perry!" shouted Joe peevishly.

"Let that alone and catch these bundles!" Perry obeyed and one by one the fellows scrambled from wharf to boat.
And, having reached the bridge deck, they subsided exhaustedly onto the two cushioned seats or the gunwale.

Perry viewed their inflamed, perspiring faces in smiling surprise.