Monograph 1 is Dr. George Veni's doctoral dissertation, completed at the Pennsylvania State University in 1994. It examines aquifer and cave development in the Lower Glen Rose Aquifer within Bexar, Comal, Kendall counties, where many of the longest caves in Texas occur. This publication will be of interest to not only geoscientists and cave explorers, but to planners, administrators, educators, and citizens who manage or depend on the Lower Glen Rose Aquifer - which is a state designated critical water resource of limited supply that is experiencing rapidly increasing demand. This report includes extensive appendices with cave, well, spring, water level, water quality, and other appendices. Due to the likely interest among non-geologists, an extensive glossary has been added by the author to this reformatted edition.