In my talk, I shall offer a transcription and analysis of an apparently unique Genizah fragment (T-S Ar. 35.109), which contains the letters of the Greek alphabet and their names, as well as a full list of the different permutations of Greek consonants and vowels and their pronunciation, all written in Hebrew characters. This list clearly was intended to serve as a manual for reading Greek, designed for readers of the Hebrew alphabet and newcomers to a language with vowels, but its more specific historical context is not yet entirely clear.