Ed Bishop, guide.
Ed did mountains of exploration in Mammoth Cave. He is best known for his expeditions with Max Kaemper in 1908.
He must have been a pretty cool cat to do exploration with another cat from Germany. They sometimes took young ladies along on their expeditions as well.
Some of the famous place names I lead people through today on wild tours were first discovered and named by Ed and Max.
This particular signature is found on the tourist trails along Main Cave. Easy to find if you know where to look.