Cyrillic script consonants from the older Glagolitic alphabet for sounds not found in Greek. Tradition holds that Cyrillic and Glagolitic were formalized either by Saints Cyril and Methodius who brought Christianity to the southern Slavs, or by their disciples. Paul Cubberley posits that although Cyril may have codified and expanded Glagolitic, it was his students in the First Bulgarian Empire under Tsar Simeon the Great that developed Cyrillic from the Greek letters in the 890s as a more suitable script for church books. Later Cyrillic spread among other Slavic peoples, as well as among non-Slavic Vlachs. Cyrillic and Glagolitic were used for
De Landa alphabet De Landa alphabet The de Landa alphabet is the correspondence of Spanish letters and glyphs written in the pre-Columbian Maya script, which the 16th-century bishop of Yucatán, Diego de Landa recorded as part of his documentation of the Maya civilization. With the aid of two Maya informants familiar with the script, de Landa made an attempt to provide a transcribed "A, B, C" for the Maya script with the intent of providing a key to its decipherment and translation. Despite its inaccuracies, the information provided by him would much later prove to be crucial to the mid-20th century breakthrough in