I think that the song “Your Obedient Servant” from the musical Hamilton would best represent this portion of the book. The song describes two men writing letters back and forth, each signing off with the song’s title and then their name. This relates to what Mina and Lucy are doing. The chapter starts with Mina sending Lucy letters, and then Lucy sends her multiple ones at once. This is almost exactly what Hamilton does to Burr in the song.