“By Jove, Fanning, but you’ve given me an idea,” he said, speaking eagerly and quickly.

“One moment,” said Renshaw, holding up his hand. “I have an idea, too, and indeed it’s astonishing it should never have struck me before. You must remember old Greenway was talking very disjointedly at the end of his yarn—poor old chap. He was nearly played out. Well, I tried to take down his words exactly as he uttered them. Look at this ‘Straight from—the smaller one—facing the setting sun. Within—day’s ride.’ Does nothing strike you now?”

“Can’t say it does,” growled Sellon, “except that the old sinner must have been telling a most infernal lie. We’ve spent the last four days fossicking around within a day’s ride of his turret-top mountain, and devil a valley of the kind he describes exists.”

“Well, what strikes me is this. He may have meant to say ‘Within two days’, or three days’, or four days’ ride.’ See?”

“Yes. If that’s so he might as well have told us there was plenty of gold to be found between this and Morocco. It would have helped us about as much. But now I’ll give you my idea. It sounds ‘tall,’ and I dare say you’ll laugh.”

“Never mind. Drive on,” rejoined Renshaw, looking up from the paper which he had been studying intently.

“Well, you mentioned the word ‘crater’ just now. If this ‘valley’ of old Stick-in-the-mud’s really exists, it is, as you say, a crater-shaped concern. Now we’ve fooled away days in hunting for this place at the bottom of each and every mountain around. What if, after all, we ought to be looking for it at the top?”

An eager flash leaped from the other’s eyes.

“By Jove! That is an idea!” he burst forth.

“Eh! Not a bad one, I think?” said Sellon, complacently.