Stephen Bishop, born into slavery and brought to Mammoth Cave sometime before 1838, became the most celebrated of these guides — a man who not only led tourists but explored new passages himself, extending the known map of the cave substantially.

His hand-drawn map of Mammoth Cave, made in the 1840s, was one of the first detailed cartographic efforts to document the cave’s extent.

Bishop and the other enslaved guides of his era — Mat Bransford, Nick Bransford, and others from the Bransford family who would go on to guide at Mammoth Cave for generations — worked in a place that had been explored by ancient Indigenous miners for three thousand years before their time.

Neither they nor the tourists they guided knew then what archaeology would later establish: that the cave passages they were navigating had been mapped by an earlier generation of explorers, equally skilled, equally determined, working in even more extreme conditions.