'Yes; it's plainer and plainer every instant,' said Dick.

Chippy nodded. 'Wot do we do?' he asked.

'We must stop him, somehow,' replied Dick. 'He might do the greatest harm to our country. It's a scout's work to collar such people. B.-P. himself has caught four foreign spies at different times in England.'

Chippy jerked his head towards the bank, and began to crawl back. Dick understood that he was going to see what the man was at now, and followed.

Albert still sat under the steep bank, pencil in hand, and a fresh sheet of paper on his knee. Chippy nudged Dick, and made signs to him to duck down, as Bardon boys say.

'I'm off to get a bit closer and see wot he's a-doin',' breathed Chippy. 'Stop 'ere an' "pewey" if he shifts.'

Dick nodded, and Chippy slid away as quietly as a snake.

Six or seven minutes passed before Dick saw his companion again. Then he caught sight of the Raven's head as Chippy appeared round the trunk of the pine which grew on the steep bank of the pit.

Little by little Chippy crept on, until his head was thrust over the brink, and he was looking straight down on the concealed man, the latter now drawing lines on his sheet of paper. His head was bent low over his work, and Chippy craned out farther and farther to glance over his shoulder. The man sat up and began to fold this paper as before, then reached out his hand for the boot which lay beside him, and deftly unscrewed the heel once more. As soon as the paper was stowed away and the heel refastened, he took the boot in hand to put it on his foot.

Suddenly he looked up. Either he had caught Chippy's shadow, or he had felt that he was watched. He looked up, and saw the boy hanging over the brink.