Book on Tibet and woman adventurer??

About 10 or 15 years ago I was looking for a book on adventurous and daring women and I found one. I can't recall the title or the author's name and wonder if someone can help. Googling has produced nothing.

This woman travelled to Tibet when it was illegal and her goal was to get to Llasa. Her many travels were financed by an older man she married for his money. I believe the time period was the 30's or 40's? The woman was either American or British.

Could be Alexandra David-Neel

http://www.librarything.com/work/146251

Yes! Thanks. I knew as soon as I saw her name. Happened a decade or so before I thought, but I was close.