Another odd coincidence is found in the Aztec name for their priests, _papahua_, the root of which _papa_, (the _hua_, is merely a termination).

In the Old World the word _Papa_, Pope, or Priest, was connected with the idea of father or grandfather, but the Aztec word has no such origin.
When the Aztecs abandoned their temples, and began to build Christian churches, they called them also "teocallis," and perhaps do so to this day.
The heavy tropical rains have to a great extent broken the sharpness of the outline of these structures, and brought them more nearly to the shape of real pyramids than they were originally; but, as we climbed up their sides, we could trace the terraces without any difficulty, and even flights of steps.
The pyramids consist of an outer casing of hewn stone, faced and covered with smooth stucco, which has resisted the effects of time and bad usage in a wonderful manner.

Inside this casing were adobes, stones, clay, and mortar, as one may see in places where the exterior has been damaged, and by creeping into the small passage which leads into the Temple of the Moon.

Both pyramids are nearly covered with a coating of debris, full of bits of obsidian arrows and knives, and broken pottery.

On the teocalli of the moon we found a number of recent sea-shells, which mystified us extremely; and the only explanation we could give of their presence there was that they might have been brought up as offerings.