"Thing is still a mystery," finished Tom.
A gruff voice floated down from above.
"Go on now—get away from here with all that gab, or 'twon't be no mystery what happens next."
A head thrust out of a window nodded vigorously.
"Oh!" cried Bob, looking up, somewhat startled.
"Where'd ye come from?"
"That's what they all ask. Beg your pardon, sir!"
"Beg your pardon, sir, also!" added Jack, with a grin.
Several other similarly polite remarks did not appease the wrath of the man above, so they started off, quite oblivious to the words hurled after them.
"Grouchy old gent!" murmured Jack.