I for one would be interested in seeing some original sources and secondary literature on these supposed Hellenistic letter types. Were they really all that rigid anyway? Is it more that whatever scholar popularized the idea of distinct letter types was hammering most Hellenistic letters into ill-fitting categories in the first place? If so, it would be no surprise that Osborne would not find Paul’s writings fitting into any of the categories.
But perhaps there were stringent letter types with particular features that most Hellenists felt bound to use. If that is so, it makes sense that Paul’s letters would be different - the Church and Apostleship were both new things, and would require new writing styles that would not fit in the old letter-type wineskins.



Nielsen Digital




