The Collaborative International Dictionary
Epistolographic
Epistolographic \E*pis`to*lo*graph"ic\, a. [Gr. ?: cf. F. Pertaining to the writing of letters; used in writing letters; epistolary.
Epistolographic character of writing or Epistolographic mode of writing, the same as Demotic character. See under Demotic.
Wiktionary
epistolographic
a. 1 Relating to the writing of letters 2 Characteristic of a letter