"Let's think it out," said Jack, seating himself on a flat rock, while Dolly did likewise. "I believe we can think out where Mr. Rose would have been likely to put the thing. Now I don't believe it would be very close to where he started us. These nearby digging places are all frauds. Let's go to the limit of the space he said, and try all 'round the edge."
"How can you tell?" And Dolly looked at him with a puzzled expression.
"Why, he said fifty feet, you know, and I can pace off what ought to be about fifty feet and then we'll walk all the way round."
They did this, and as they walked round the circle which Jack declared was about the boundary of the fifty-foot radius, they soon came upon a good-sized iron key.
"This is it!" cried Jack; "we've struck it! This is the key to the chest, and the chest is buried here!"
"Good work!" and Guy Holmes and Maisie Norris appeared just in time to hear Jack's exclamation. "Come on, let's all dig!"
"No," said Dolly, sitting down on the ground; "I can't dig any more; I'm too tired. Maisie and I will sit here while you boys do the digging."
"All right," the boys agreed, and they fell to work with a will.
They had thrown out but a few spadefulls of dirt, when they struck something hard.
"Hooray! hurroo!" cried Guy; "we've got it! We've struck the treasure!"