Hulbert Footner 
The Sealed Valley [EPUB ebook] 

If you want a brisk tale of adventures, in which leading parts are played by a hidden, almost inaccessible, valley, a remnant of a once-powerful tribe of Indians and a gold mine of fabulous value, then you will find something pretty much to your taste in this book by Hulbert Footner. And when we add the fact that a high-souled Indian girl, a sort of Joan of Arc of her tribe, dreams of restoring the bygone glory of her race and to this end sacrifices her love for a white man, it is evident that here is a blend of adventure and love and sacrifice that ought to suit a wide variety of tastes.