He and Bob hurried outside where they had left the naturalist and Ned. They found the pair gazing down the street toward the tunnel entrance.

And as they gazed they saw the big door swing slowly open, while from the passage came Noddy Nixon, Vasco Bilette and the others of their crowd. A low cry of surprise broke from Noddy as he stood face to face with the very persons he and Vasco were seeking.


[CHAPTER XXIII.]
BOB IS KIDNAPPED.

For a minute or two the unexpected encounter so astonished all concerned that no one spoke. Noddy seemed ill at ease from meeting his former acquaintances, but Vasco Bilette smiled in an evil way. Chance had thrown in his path the very person he wanted. Tom Dalsett was the first to speak.

“Well, we meet again,” he said, with an attempt at cheerfulness. “How do you all do?”

“I don’t know that we’re any the better for seeing you,” remarked Professor Snodgrass, who was plain-spoken at times.

“Oh, but I assure you it’s a sight for sore eyes to get a glimpse of you once more,” went on Tom. “Besides, this is a free city, you know, even if it is an old, underground one; and we have as much right here as you have.”

“True enough,” broke in Jerry. “But you may as well know, first as last, that we’re done fooling with you and your gang, Noddy Nixon. If you annoy us again there’s going to be trouble!”