The passages branch and change character.

Some sections require walking; others require crawling; others require squeezing through restrictions that limit the caver’s movements to what the narrow rock allows.

The mud is constant — brown and sticky, coating everything, making surfaces slippery in ways that demand careful movement.

More than a thousand feet in — roughly three hundred meters, a substantial distance through underground terrain — the modern caver reaches the area where the bones were found.

The specific features of this location: the precise dimensions of the passage, the orientation of the cave walls, the specific deposit in which the bones lay — are documented in the archaeological literature in ways that make it possible to describe the general character of the location.