 Most have passages in Greek as well as in Demotic, and most have words glossed into Old Coptic (Egyptian language written with the Greek alphabet [which indicated vowels, which Egyptian scripts did not] supplemented by extra signs taken from the Demotic for sounds not found in Greek); some contain passages written in the earlier Egyptian hieratic script or words written in a special "cipher" script, which would have been an effective secret code to a Greek reader but would have been deciphered fairly simply by an Egyptian.