About the Mystery of the Letters divine creation in the biblical Creation according to Genesis, and of 22 corresponding works of salvation by Christ, elaborating this theory through descriptions of the various letters and interpretations of their shapes. This is followed by an account of the history of the alphabet, which weaves together elements of Greek mythology and the Hebrew Bible as well as several Jewish and pagan texts: according to this account, the Hebrew alphabet was first handed down to mankind by divine inspiration during the generation of Enoch, but was lost during the Confusion of Tongues. God subsequently revealed the Greek alphabet on a
Biblical Hebrew source for the modern Hebrew alphabet. All of these scripts were lacking letters to represent all of the sounds of Biblical Hebrew, though these sounds are reflected in Greek and Latin transcriptions/translations of the time. These scripts originally only indicated consonants, but certain letters, known by the Latin term "matres lectionis", became increasingly used to mark vowels. In the Middle Ages, various systems of diacritics were developed to mark the vowels in Hebrew manuscripts; of these, only the Tiberian vocalization is still in wide use. Biblical Hebrew possessed a series of "emphatic" consonants whose precise articulation is disputed, likely ejective