Read this excerpt from Through the Looking-Glass by Lewis Carroll.

“I declare it's marked out just like a large chessboard!” Alice said at last. “There ought to be some men moving about somewhere—and so there are!” She added in a tone of delight, and her heart began to beat quick with excitement as she went on. “It's a great huge game of chess that's being played—all over the world—if this IS the world at all, you know. Oh, what fun it is! How I WISH I was one of them! I wouldn't mind being a Pawn, if only I might join—though of course I should LIKE to be a Queen, best.”

If a reader wanted to compare this game of chess to an ordinary game of chess, where would be the best place to find the rules for the game?

through an inference
later in the text
in another source
earlier in the text