Mr. Hurn assembled the little party about twenty-five yards ahead of a fringe of trees which bordered the road-side and terminated after a slight break in a compact little spinney. He turned to Captain Merrill.

'Say, young man,' he suggested, 'you just hop round the other side and make sure there's no one about.'

Merrill, in obedience to a glance from the General, hurried off. The latter turned towards Mr. Hurn.

'You are leaving us very much in the dark, sir, he remarked. 'What is it that you propose to attempt?'

'I propose to accomplish on a small scale,' Mr. Hurn said grandiloquently, 'a work of destruction which you can repeat upon any scale you choose. See here.'

With the utmost solemnity he drew from his pocket a schoolboy's ordinary catapult and a pill-box. From the latter he selected a pellet a little smaller than a marble. He fitted it carefully into the back of the catapult. Captain Merrill, who had completed his tour of the spinney, returned.

'There is no one about, sir,' he announced.

Mr. Hurn had suddenly the air of a man who attempts great deeds. His attitude, as he stepped forward, was almost theatrical. The General had become very stern and was obviously annoyed. Lavendale's heart was sinking fast. He was already trying to think out some form of apology for his share in what he felt had developed into a ridiculous fiasco. Nevertheless, their eyes were all riveted upon the strange little figure a few feet in front of them. Slowly he drew back the elastic of the catapult and discharged the pellet. It struck a tree inside the spinney and there was immediately a curious report, which sounded more like a slow muttering of human pain than an ordinary detonation. Mr. Hurn pointed towards the spinney. There were great things in his attitude and in his gesture. A queer, very faint, grey smoke seemed to be stealing through the place. There was a sound like the splitting of branches amongst the trees, the shrill death cries of terrified animals. The General would have moved forward, but Mr. Hurn caught him by the belt.

'Stay where you are, all of you,' he ordered. 'The place ain't safe yet.'

The wonder began to grow upon them. The various shades of green in the spinney seemed suddenly, before their eyes, to change into a universal smoke-coloured ashen-grey. Without any cause that they could see, the bark began to fall away from many of the trees, as though unseen hands were engaged in some gruesome task of devastation. The little party stood there, spellbound, watching this mysterious cataclysm. Mr. Hurn glanced at his watch.