I think something may happen to make her change her mind before I sail." The captain did not know what a good prophet he was.
When Bob came home from school that noon-time he was surprised to see his mother and Captain Spark in earnest conversation.

At first Bob thought the mariner might be telling of the escapade of the tic-tac, but when his mother made a warning gesture of silence to Captain Spark on beholding Bob the boy was puzzled.
"They must have been talking about me," he decided; "but what could it be?
I don't think he would tell about the tic-tac, but there's certainly something queer afoot." The truth was that the captain was renewing his plan of taking Bob to sea.

Had the boy known of it he would have been much surprised, for he never dreamed of such a thing.
"How did you get along at school to-day ?" asked Captain Spark, as Mrs.Henderson went out to get dinner.
"Pretty well." "Didn't put any bent pins in the teacher's chair, did you ?" "No, sir." The boy hoped the captain would not ask him what other prank he had been up to, for the truth was that Bob had that morning taken a live mouse to the classroom, releasing it during a study period, and nearly sending the woman teacher and the girl pupils into hysterics.
His part had not been discovered, but the teacher had threatened to keep the whole class of boys in that night until the guilty one confessed, and Bob knew he would have to tell sooner or later, if some of his companions did not "squeal" on him, in order that they might be released from suspicion.
"That's right," went on the mariner.

"Never put bent pins in the teacher's chair." As Bob feared, some one during the afternoon session told of his part in the mouse episode, and he was the only one kept in.

The teacher made him stay while she corrected a lot of examination papers, and in the silent schoolroom the boy began to wish he had not been so fond of a "joke." The teacher, who was a kind-hearted woman, talked seriously to her rather wild pupil, pointing out that it was a cowardly thing for a boy to frighten girls.