“I went for a walk, sir.”

“And, may I inquire, are you in the habit of violating the strictest school rules by absenting yourself from the house during the night?”

“Yes, sir.”

“What?”

“Yes, sir.”

“This is an exceedingly serious matter.”

Wyatt nodded agreement with this view.

“Exceedingly.”

The pen rose and fell with the rapidity of the cylinder of a motor-car. Wyatt, watching it, became suddenly aware that the thing was hypnotising him. In a minute or two he would be asleep.

“I wish you wouldn’t do that, father. Tap like that, I mean. It’s sending me to sleep.”