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108 <str<strong>on</strong>g>The</str<strong>on</strong>g> <str<strong>on</strong>g>Mystery</str<strong>on</strong>g> <strong>on</strong> <strong>the</strong> <strong>Great</strong> <strong>Wall</strong> <strong>of</strong> <strong>China</strong><br />
c<strong>on</strong>crete. But as he c<strong>on</strong>tinued reading, he<br />
learned that “lime” is limest<strong>on</strong>e that had been<br />
crushed into a powder. It is still an ingredient in<br />
cement.<br />
He looked back at <strong>the</strong> X. It was just drawn<br />
<strong>on</strong> <strong>the</strong> side <strong>of</strong> <strong>the</strong> wall, almost as if it was in no<br />
special place. But somehow, he felt that might<br />
be where <strong>the</strong> treasure was. He was afraid to go<br />
up in <strong>the</strong> watchtower. <str<strong>on</strong>g>The</str<strong>on</strong>g> mean man could be<br />
up <strong>the</strong>re. And he sure didn’t want to dig around<br />
in any dried animal poop to look for treasure, if<br />
he could help it!