Love letter from Burke

Love letter from Burke are a series of four paper notes in Fallout 3.

Locations
They are sent by Mister Burke to female player characters if they choose to resolve The Power of the Atom by using the Black Widow perk. They are received from Moriarty at Moriarty's Saloon if you wait a few days between each delivery.

Transcripts
Incorrect spelling is as given in the game.

Love letter from Burke (#4)
Carta de amor de Burke Любовные письма от Бёрка Любовні листи від Берка