Searching for historical cave lengths...NSS Cavers -
I'm searching for whatever data I can find on the known (or estimated) lengths of caves in 1941. While I realize there will be little data from back then, anything I can find would be helpful. CaverBob's data goes back to 1979, but Dave Bunnell suggested the national parks might have localized information.
Any ideas from the hive mind?
Thanks!
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