glyphs, [77]-[79],[102]

katun used in, [222]-[225]

nature, [222]

tun used in, [225]-[226]

Period-marking Stones. See Monuments.

Phonetic writing—

argument for, [26]-[30]

traces discovered, [iv], [26]-[30]

Piedras Negras (city)—

altar inscription, interpretation, [227]