There is a thread on cavechat.org that has lots of information regarding this topic: http://forums.caves.org/viewtopic.php?f=26&t=4300
P.S. I am a Tennessee caver who somehow stumbled onto this mailing list a while back, I don't really remember how. At any rate, it's been a pleasure to learn more about Texas caving through this list :-). -Jonny ^v^
