"I'm keeping my eyes particularly wide open, and my mouth tight shut," replied Pamela, as she kissed her friend good-bye and helped her to climb the palings.

Avelyn went home very thoughtfully. She found the boys digging in the kitchen garden, and confided to them her morning's experience. They decided that something mysterious must be going on at Moss Cottage.

"It looks fishy!" said David, slowly scraping the earth off his boots with the edge of his spade.

"What has that old Hun got up his sleeve?" enquired Anthony, shaking his head.

"I don't know. After what we saw in the wood I'd believe anything of him."

"Shall we tell the Vicar, or somebody?" suggested Avelyn.

"No! no!" protested David emphatically. "Whatever you do, Ave, for goodness' sake don't blab! We've no proper evidence yet, and if stories begin to get about the village he'll know he's suspected, and he'll be careful. Just you leave this to me. It's my first 'case', and I want to worry it out. Remember, I'm going to be a barrister some day, when the war is over, if I don't go out to France first and get killed. Old Hockheimer's deep, but he doesn't know we're watching him. Two British boys ought to be a match for a German!"

"I'd shoot him first and watch him afterwards if I had my way," declared Tony bloodthirstily.

It was on that very same afternoon that a fresh planet swam into the Watson horizon, or, in other words, that they made a new acquaintance. The Vicar was distinctly responsible for it. He was standing at the top of the churchyard steps, talking to a somebody, the toe of whose boot alone was visible round the corner, and when he saw Anthony passing in the road below he beckoned to him. Tony mounted the steps, and found that the boot belonged to a young officer in khaki, who stood with his hands behind his back contemplating the tombstones.

"Hallo, sonnie!" said the Vicar affably. "Doing anything special this afternoon? This is Captain Harper, who's in charge of the camp near the river. He wants to go and see the Roman fort on the top of Weldon Hill, and he doesn't know the way. Have you time to take him?"