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http://www.bookbrowse.com/reviews/index.cfm?book_number=1560
Provides a short summary of The Glass Castle and numerous links to reviews of the work in magazines and newspapers.
The Question and Answer section for The Glass Castle is a great resource to ask questions, find answers, and discuss the novel.
The answer to your question is readily available in GradeSaver's detailed summary and analysis for Part II of the novel.
Let's scadaddle!
He says that he will find a lot of gold.