“There’s Peveril Castle,” Emma exclaimed as she pointed to a brown square on the map. “Where is the Blue John Fluorite found?”
“Mr. M said the fluorite was mined from two different caves in the foothill of Mam Tor,” Brody said. “The entrances to the cave didn’t look fancy, just like holes in the grass of the hillside on the internet photos I found.” There were no computers around in the 1770’s to help them now, so Brody tried hard to remember the details of the caves he read about on his computer before they left home.
“Mr. M said that the Blue John Cavern and Treak Cliff Cavern both had the fluorite but that his samples came from the Blue John cave,” Brody said. “We should go there.” The two kids scoured over the maps looking for the Blue John Cavern.
The maps were shifting and sliding past one another, making it hard to read. “We need tape,” Emma declared.
Brody laughed. “I don’t think it’s invented yet.” He pulled his cell phone from his pocket.
“Are you going to make a call?” Emma joked. “The cell towers won’t be built for about 200 years!”
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