epistology means the study of letters and epistles.
Etymology
From Latin epistola or its etymon Ancient Greek ἐπῐστολή (epĭstolḗ) + -ology.
noun
- The study of letters and epistles.“Chapter Five is an analysis of several poems further to clarify Carew’s ideas, and six, “The Crown of Bays” treats other genres of Carew’s poetry—epistology and elegy.”