These are the letters found in homes of Natasha Grindelwald and Draco Malfoy, Some were never found. But these are the ones that were

"You're his humanity, Riley. It's obvious." BOOK ONE IN THE RILEY EVANS SERIES [THE VAMPIRE DIARIES SERIES 2&3] STARTED: MARCH 19, 2017 FINISHED: APRIL 30, 2018 REWRITE STARTED: MARCH 24, 2021 REWRITE FINISHED: MAY, 22, 2021