He was not mistaken, for it came near night.
A boy appeared at Frank's door, and handed over a sealed envelope, which he explained he had received from a man with a heavy beard. He said he had been paid a quarter of a dollar to deliver it.
Frank tore it open and read:
"You will be invited to go to the theatre to-night.
Do not go. Your enemies will be on the watch for you."
"Oh. I knew it was coming!" cried Frank, scornfully. "It is a flimsy trick! It actually disgusts me!"
Harry was out, and Merriwell was alone.
Later Harry came in, accompanied by Diamond, Browning, Griswold and Creighton.
"I say, old man," cried Charlie Creighton, addressing Frank, "we have something on for to-night, and we want you to take a hand."
"You may take a few rotten eggs or decayed vegetables with that hand, if you like," grinned Griswold.