“Well, I’ll be jiggered!” gasped Jerry.

“Wouldn’t that put mustard on your egg sandwich!” exclaimed Bob.

“What’s to be done?” asked Ned, after a pause.

“Done? Why we’ve got to go back after him, of course,” was Jerry’s rejoinder. “I wonder if we can find the place in the darkness?”

It was rather a risk, but, fortunately they had not gone far, and the lights of the town they had left were quite brilliant. Then, too, there was no other place near it, save the one across the river, and this was easily distinguished.

Soon they were skimming back, and in a little while they had landed on the outskirts of Wakedell.

“You two had better stay here with the airship, and I’ll go in town and see if I can find the professor,” said Jerry. “I don’t believe I’ll have much trouble in locating him.”

The tall lad was soon on his way through the principal street of the city. He was at once recognized as one of the boys from the airship, and was cordially greeted.

“The professor—that little bald-headed man?” repeated several, when Jerry had questioned them. “No, we haven’t seen him. But then we’ve been so busy since the ferry started to run, that there’s nothing uncommon in that. I say, but you lads did us a good service.”