"Get it all out, Jim, quick!" said Moira with feminine impatience.

I did. I pressed 2 and I got W, and so on all along the keyboard, and when I had finished I pulled the sheet out and handed it to them. "Read it out, Moira," I said. "It's your turn."

"'When the Lone Tree, the hut door and the rising sun are in line measure seven feet east. Then face direct north, draw another line at right angles to previous one, extending for twelve feet. Dig then.'"

"If it hadn't been for you," said Cumshaw, "we wouldn't have found it. I congratulate you," and he held out his hand to me.

"Rubbish!" I said. "It was all a lucky accident." But all the same I took the proffered hand.

"We can go right on with it now," Moira cried joyously. "There's nothing to stop us."

"Only that we've got to find the valley yet," said Cumshaw gloomily. "My father made several attempts but couldn't locate it."

"You've got to bear in mind," I told them, "that we've got some information your father hadn't, strange though it seems."

"And that?" Cumshaw queried quickly.

"We're looking for a valley that's got a lone tree overlooking it. Your father didn't seem to be aware of that."