Cave Regions of the Ozarks and Black Hills by Luella Agnes Owen

Cave Regions of the Ozarks and Black Hills, written by Luella Agnes Owen, details her exploration and study of caves in the Ozark and Black Hills regions. Published in 1898, the book likely stems from Owen's lifelong interest in geology, particularly fueled by a field trip she took to the Ozarks in 1890. The book likely details her observations and findings within these cave systems.

Here's some additional information I found:

• The book is available for free on Project Gutenberg [Project Gutenberg eBook of Cave Regions of the Ozarks and Black Hills, by Luella Agnes Owen].
• Owen seems to have been a woman passionate about geology, who turned her interest into a book.