'That'll hold Buck for a while,' was his comment. 'I guess we shan't hear from him for a week or two. That's the best cure for the headache I've ever struck.'

He rubbed the lump that just showed beneath his hair. I did not wonder at his emotion. Whoever had wielded the sand-bag had done his work well, in a manner to cause hard feelings on the part of the victim.

I had been vaguely conscious during this conversation of an intermittent noise like distant thunder. I now perceived that it came from Glossop's classroom, and was caused by the beating of hands on the door-panels. I remembered that the red-moustached man had locked Glossop and his young charges in. It seemed to me that he had done well. There would be plenty of confusion without their assistance.

I was turning towards my own classroom when I saw Audrey on the stairs and went to meet her.

'It's all right,' I said. 'They've gone.'

'Who was it? What did they want?'

'It was a gentleman named MacGinnis and some friends. They came after Ogden Ford, but they didn't get him.'

'Where is he? Where is Ogden?'

Before I could reply, babel broke loose. While we had been talking, White had injudiciously turned the key of Glossop's classroom which now disgorged its occupants, headed by my colleague, in a turbulent stream. At the same moment my own classroom began to empty itself. The hall was packed with boys, and the din became deafening. Every one had something to say, and they all said it at once.

Glossop was at my side, semaphoring violently.