Johnnie Gerald, a young man known to have good nerve and a good reputation, volunteered, he said, to go into the cave if he would be allowed -to pick a crew he. could trust not to pull out loose rock and make the opening more dangerous. He went into the cave and came out a physical wreck. Lieutenant Burden of the Louisville fire department, he said, "did the same thing. There was something that unnerved the best men and all of them were absolutely exhausted when they came out."