slaves, since, as Ja explained, the Mahars flew to and from their place of ceremonial, entering and leaving the building by means of the apertures in the roof.
"But," added Ja, "there is an entrance near the base of which even the Mahars know nothing. Come," and he led me across the clearing and about the end to a pile of loose rock which lay against the foot of the wall. Here he removed a couple of large bowlders, revealing a small opening which led straight within the building, or so it seemed, though as I entered after Ja I discovered myself in a narrow place of extreme darkness.
"We are within the outer wall," said Ja. "It is hollow. Follow me closely."
The red man groped ahead a few paces and then began to ascend a primitive ladder similar to that which leads from the ground to the upper stories of his house. We ascended for some forty feet when the interior of the space between the walls commenced to grow lighter and presently we came opposite an opening in the inner wall which
