Young Adult book about 2 estranged cousins who team up on a ranch to hunt for a lost family gold mine. One of the cousins breaks his leg at some point. They find secret messages inside canes that when wrapped around the handles form letters. They eventually find one of their ancestors dead in a cave. There was something about Archimedes as well and using water displacement as a measure I think. Read it in the early 80s but no idea how old it was.
Stump the Bookseller
New format, same book stumper solving.
OK, was there possibly something to do with glowing paint or something? Phosphorescence (sp?) of some kind? This sounds familiar and a bit like another book I am searching for as well…
I know I’ve read this book too. Could it be “Mystery of the Old Cave” by Helen Fuller Orton?
After further investigation i “may” have found the book we are looking for.
It may be:
[ THE INDIAN MUMMY MYSTERY , by Troy Nesbit . ]
It seems to have most of the elements you and i were seeking. The only thing is that to me this book seems too long…. 270+ pages ! I dont know if i would have read a book that long – at that time – in my life. Hope this helps.
I am looking for this too. Had it as a hand-me-down in the mid 1980s. I think it was one book in the Young America Book Club series. I have another book from that club, Pursuit in the French Alps, copyright 1963. Both books were probably published around the same time. I can still visualize the greenish cover, but can’t remember the title. I think the title was very similar to many Hardy Boys books, making the search difficult.
Solved! It is Mystery Mountain by Florence Laughlin.