Apparently, most anything can be found at Wikihow” HOW TO WRITE AN EPISTOLARY NARRATIVE :
An epistolary narrative is a narrative inside a letter, serving the purpose of telling a story from the perspective of that character. It is a story that has not yet been told, and therefore it fills a gap or focuses on an undeveloped element in the existing narrative of the original text. The story dominates the letter: the character’s main purpose in writing is to tell this story to the recipient (a friend, relative or another character).
- Include all the structural features of an actual letter: address, date, salutation, etc.
Open the letter in the present tense and deal with the character’s current emotions and life.
Continue the narrative in past tense, as it is a story of something that has already happened.
Reveal aspects of the character’s ideology- their beliefs, attitudes and values.
Develop relationships with other characters through experiences they shared. You can include other characters that appear in the original text or create additional ones to suit your purposes. Write about bonds, rifts, conflicts or similarities or differences in ideologies.
Show how the character responded emotionally to the shared experiences.
Close the letter in the present tense.