 They explored some of the routes and they learned to read and write. I mean, it was actually frowned upon or illegal for slaves to know how to read and write, but it seems that the record book says they only entertained and had guests as the best educated folks from around the world through the cave. We think that he probably couldn't write a letter, but he was well enough that he could at least write his name Matt. And we just keep finding his name further out and deeper down in the cave. The Bransford family history at Mammoth Cave is rich and enduring.