there was a great deal of commonality in letter-writing customs.2 From England to Egypt, we find Greco-Roman letters following the same format and using the same language, and even generally the same diction and rhetoric. Even while the Jews (and some other cultures) stubbornly held on to their local languages, they still followed the general format of the Greco-Roman letter. When we compare Greek and Latin papyrus letters, we find them strikingly similar, even though the languages were different.
Page 56