Mayan writing developed some 500 years later and farther south in Mexico and Central America.

In a series of published and unpublished studies in the 1930s, Whorf argued that Mayan writing was to some extent phonetic.

He received his doctorate in Hamburg in 1952 with a thesis on Mayan writing.

Mayan writing has hundreds of different signs, or glyphs, in the form of humans, animals, gods and everyday tools.

Catherwood made drawings and paintings of the ruins they found and people became very interested in Mayan writing.

In Mayan writing, logograms and syllable signs are combined.

He was fascinated with Mayan writing.

The Sumerian, the Ancient Egyptian, the Chinese and the Mayan writings are separate in their invention.

The Mayan writings say the voyage lasted one moon cycle.

"The Mayan writing says it was mainly copper, jewels, gold, and silver."