A letter of Abba ʼ or "Habakkuk" to , entitled Anqasa Amin "Gate of the Faith" , giving his reasons for abandoning , although probably first written in Arabic and later rewritten in an expanded Geʽez version around 1532, is considered one of the classics of later Geʽez literature.
International Standard Bible Encyclopedia Online.
Apart from this, Geʽez phonology is comparably conservative; the only other Proto-Semitic phonological contrasts lost may be the interdental fricatives and.
A boy who had reached this stage would moreover usually be able to write, and might act as a letter writer.