Finally, Annie went down the tree house saying she's gonna take a peek.
And having taken the castle book, Jack followed her.
Reading the book under the tree house, he found that a helmet the knight was wearing was very heavy
and around the castle there's a moat in which there could be crocodiles.
While Jack was reading the book, Annie was seeing the real things.
And she couldn't help going into the inside of the castle and watching what's going on.
So while Jack was reading the book, Annie had gone.
Jack saw Annie dashing across the drawbridge and getting into the real castle.