Conn, Herb and Conn, Jan. 1977. The Jewel Cave Adventure, Fifty Miles of Discovery Under South Dakota. Zephyrus Press, Inc., Teaneck, NJ. 238 p.
Jewel Cave, in the Black Hills of South Dakota, is today one of the largest and most beautiful cave systems known in the world and a major tourist attraction, administered by the National Park Service. But back in 1959 the entrance sign proclaimed, "This is a small cave." It was in that year that Herb and Jan Conn- well known rock climbers form the east who had settled in the Black Hills because of its myraid of unclimbed pinnacles-were first induced to enter Jewel Cave. On that first day they learned to negotiate the intricate, crystal-lined underground passages, and they experienced the thrill of discovering places where no one had ever before set foot. It was a turning point in their lives, and in the history of Jewel Cave.