the letter from Rastislav to Michael III states clearly that Rastislav's people "had already rejected paganism and adhere to the Christian law." Rastislav is said to have expelled missionaries of the Roman Church and instead turned to Constantinople for ecclesiastical assistance and, presumably, a degree of political support. The Emperor quickly chose to send Cyril, accompanied by his brother Methodius. The request provided a convenient opportunity to expand Byzantine influence. Their first work seems to have been the training of assistants. In 863, they began the task of translating the Gospels and necessary liturgical books into the language now known as Old Church Slavonic and traveled to Great Moravia to promote it. They enjoyed considerable success in this endeavour. However, they came into conflict with German ecclesiastics who opposed their efforts to create a specifically Slavic liturgy. For the purpose of this mission, they devised the Glagolitic alphabet, the first alphabet to be used for Slavonic manuscripts. The Glagolitic alphabet was suited to match the specific features of the Slavic language. Its descendant script, the Cyrillic, is still used by many languages today. The brothers wrote the first Slavic Civil Code, which was used in Great Moravia. The language derived from Old Church Slavonic, known as Church Slavonic, is still used in liturgy by several Orthodox Churches and also in some Eastern Catholic churches. It is impossible to determine with certainty exactly what the brothers translated. The New Testament and the Psalms seem to have been the first, followed by other lessons from the Old Testament. The "Translatio" speaks only of a version of the Gospels by Cyril, and the "Vita Methodii" only of the "evangelium Slovenicum," though other liturgical selections may also have been translated. Nor is it known for sure which liturgy, that of Rome or that of Constantinople, they took as a source. They may well have used the Roman alphabet, as suggested by liturgical fragments which adhere closely to the Latin type. This view is confirmed by the "Prague Fragments" and by certain Old Glagolitic liturgical fragments brought from Jerusalem to Kyiv and discovered there by Izmail Sreznevsky—probably the oldest document for the Slavonic tongue; these adhere closely to the Latin type, as is shown by the words "Mass," "Preface," and the name of one Felicitas. In any case, the circumstances were such that the brothers could hope for no permanent success without obtaining the authorization