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166 Renshaw. "It seems they have to wait for certain occasions. Mostly they make the diamonds when there's a big storm."

"A big storm" asked the scientist with a sudden show of interest. "Do you mean one of those electrical storms, such as we had the other night?"

"That's it, Mr. Parker, though why they wait until there's a storm is more than I can tell."

"Perhaps they know that on such occasions no one will venture up the mountain," spoke Mr. Damon.

"No, it isn't that," declared the scientist. "I think I am on the track of a great scientific discovery, and I will soon be able to make observations that will confirm it."

"Well, I'm going to make an observation right now," said Tom, with a laugh. "I'm going to see what there is for breakfast."

"And that reminds me," came from Mr. Jenks, "shall we move our camp, Bill, and take the tent with us to the cave?"

"I hardly think so," was the answer. "I think the best plan would be to conceal the tent somewhere around here, in case you might need it again. You can also store what food you have left."