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
Khitan small script scripts appeared most often on epitaphs and monuments, although other fragments sometimes surface. The Khitan small script was invented in about 924 or 925 CE by a scholar named Yelü Diela. He drew his inspiration from “the Uyghur language and script,” which he was shown by a visiting Uyghur ambassador at the Khitan court. For this reason, Khitan small script was originally thought to be a daughter script of the Old Uyghur alphabet. Using a smaller number of symbols than large script, small script was less complex, yet still “able to record any word.” While small-script inscriptions employed some logograms