The Servians and Russians apparently always used the Cyrillic, and its advantages gradually ousted the Glagolitic elsewhere, though the service book in the old ecclesiastical language which is used by the Roman Catholic Croats is in Glagolitic.4 While the Carian and Lycian were probably independent of the Greek in origin, so, too, at the opposite end of the Mediterranean was the Iberian.
The liturgical language of the Uniat Slav Churches is Old Slavonic, and, so far as their rite is concerned, they differ from the Orthodox Slav Churches only in using the Glagolitic instead of the Cyrillic alphabet.
The special forms of the alphabet - the Cyrillic and the Glagolitic - which have been adopted by certain of the Slavonic peoples are both sprung directly frc m the Greek alphabet of the ninth century A.D., with the considerable additions rendered necessary by the much greater variety of sounds in Slavonic as compared with Greek.
In all these matters Glagolitic differs very little from Cyrillic; it has only one symbol for ja (ya) and e because both in this dialect were pronounced the same.
The Glagolitic was founded upon the ordinary Greek minuscule writing of the period, as was shown by Dr Isaac Taylor,' though the writing of the letters separately without abbreviations and an obvious attempt at artistic effect has gradually differentiated it from Greek writing.
The Orthodox Serbs, moreover, use a modified form of the Cyrillic alphabet, while the Roman Catholic Croats use Latin characters, except in a few liturgical books which are written in the ancient Glagolitic script.