"Oh, we couldn't think of letting you go with us!" objected Gertrude.
"Why not?"
"Because you will get back to school so late, and——"
"We're not a bit afraid," protested Grace.
"But I'm coming just the same," declared Frank calmly. "I'll manage to get back to school somehow. I don't suppose Professor Callum is in Dailsburg; is he?" and he laughed.
"No, I fancy he is done paying us visits," replied Gertrude. "But I wish you wouldn't come."
"Really?" asked the lad.
Gertrude did not answer and as the Dailsburg car came along just then they all got aboard. A quick trip was made, and soon Frank was on his way back to school.
Truth to tell, he was a little nervous about being caught, and, as it was, he nearly suffered that fate. He saw a prowling monitor, but managed to elude him, and got in through a basement door that Flopps, the gardener, sometimes obligingly left open.
But Frank was no sooner in bed, having given a hasty account of his adventures to Andy than there came a summons on the door. It appeared that a number of boys had run the guard that night, and a general "round-up" was in progress. Fortunately our heroes had "a clean slate," to the obvious disappointment of Mr. Callum, who had hoped to catch them.