He did not think there would be any difficulty about it. The news that the League had been revived meant that there would be trouble in the very near future, and the prospect of trouble was meat and drink to the Irishman in O’Hara. Consequently he felt in particularly good form for mathematics (as he interpreted the word). He thought that he would have no difficulty whatever in keeping Mr Banks bright and amused. The first step had to be to arouse in him an interest in life, to bring him into a frame of mind which would induce him to look severely rather than leniently on the next offender. This was effected as follows:—­

It was Mr Banks’ practice to set his class sums to work out, and, after some three-quarters of an hour had elapsed, to pass round the form what he called “solutions”. These were large sheets of paper, on which he had worked out each sum in his neat handwriting to a happy ending. When the head of the form, to whom they were passed first, had finished with them, he would make a slight tear in one corner, and, having done so, hand them on to his neighbour. The neighbour, before giving them to his neighbour, would also tear them slightly. In time they would return to their patentee and proprietor, and it was then that things became exciting.

“Who tore these solutions like this?” asked Mr Banks, in the repressed voice of one who is determined that he will be calm.

No answer. The tattered solutions waved in the air.

He turned to Harringay, the head of the form.

“Harringay, did you tear these solutions like this?”

Indignant negative from Harringay. What he had done had been to make the small tear in the top left-hand corner. If Mr Banks had asked, “Did you make this small tear in the top left-hand corner of these solutions?” Harringay would have scorned to deny the impeachment. But to claim the credit for the whole work would, he felt, be an act of flat dishonesty, and an injustice to his gifted collaborateurs.

“No, sir,” said Harringay.

“Browne!”

“Yes, sir?”