'Yes, sir.'

'Very good. Then start at once.'

'By Jove,' said Swift, when he had gone, 'what an unholy rag! This suits yours truly. Poor old Jim, though. I wonder what the deuce has happened to him?'

At that very moment the Headmaster, leaving Philpott's House to go to Prater's, was wondering the same thing. In spite of Mr Merevale's argument, he found himself drifting back to his former belief that Jim had run away. What else could keep him out of his House more than three hours after lock-up? And he had had some reason for running away, for the conscia mens recti, though an excellent institution in theory, is not nearly so useful an ally as it should be in practice. The Head knocked at Prater's door, pondering darkly within himself.

CHAPTER XVII
'WE'LL PROCEED TO SEARCH FOR THOMSON IF HE BE ABOVE THE GROUND'

'How sweet the moonlight sleeps on yonder haystack,' observed Charteris poetically, as he and Tony, accompanied by Swift and Daintree, made their way across the fields to Parker's Spinney. Each carried a bicycle lamp, and at irregular intervals each broke into piercing yells, to the marked discomfort of certain birds roosting in the neighbourhood, who burst noisily from the trees, and made their way with visible disgust to quieter spots.

'There's one thing,' said Swift, 'we ought to hear him if he yells on a night like this. A yell ought to travel about a mile.'

'Suppose we try one now,' said Charteris. 'Now. A concerted piece, andante in six-eight time. Ready?'

The next moment the stillness of the lovely spring night was shattered by a hideous uproar.

'R.S.V.P.,' said Charteris to space in general, as the echoes died away. But there was no answer, though they waited several minutes on the chance of hearing some sound that would indicate Jim's whereabouts.