contaminated manuscripts, plus four abridgements independent of the seven families. All of these families probably ultimately share a common protograph. Not one of the textual families contains an optimal text, and none of them can be established to be the source of any other. None of the text families can be shown to have dialectal features, albeit some of the individual manuscripts in the families do have them. The protograph was written in Glagolitic, and it underwent significant change or corruption in the course of its successive transcription into seven families of Cyrillic texts. Today only Cyrillic manuscripts survive. The hyparchetypes of all seven families give the number of the letters in the alphabet as 38, but the original Glagolitic alphabet had only 36, as attested in the acrostic of Constantine of Preslav; however, one of the abridgements instead gives the number as 37 and another gives it as 42. The oldest surviving manuscript copy dates back to 1348 and was made by the monk Laurentius for Tsar Ivan Alexander of Bulgaria. The work has also been printed in Vilnius (1575–1580), Moscow (1637), Saint Petersburg (1776), Supraśl (1781). Excerpt Being still pagans, the Slavs did not have their own letters, but read and communicated by means of tallies and sketches. After their baptism they were forced to use Roman and Greek letters in the transcription of their Slavic words but these were not suitable ... At last, God, in his love for mankind, sent them St. Constantine the Philosopher, called Cyril, a learned and upright man, who composed for them thirty-eight letters, some (24 of them) similar to the Greek, but some (14 of them) different, suitable to express Slavic sounds. Legacy Hrabar Nunatak on Greenwich Island in the South Shetland Islands, Antarctica is named for Chernorizets Hrabar. See also Clement of Ohrid Constantine of Preslav John Exarch Cosmas the Priest Pre-Christian Slavic writing History of Bulgaria Simeon I of Bulgaria Footnotes Notes 9th-century births 10th-century deaths 9th-century Bulgarian writers 10th-century Bulgarian writers Chernorizets Hrabar Old Church Slavonic writers Preslav Literary School