Your letter could be about anything. Write to a prospective employer - you'll get their attention! Express your sympathy or condolences with sincerity. Write a poem. Share a recipe. Send a Valentine's Day note. Surprise a long forgotten friend. Voice a protest. Say thank you for a gift or congratulations for a job well done. Or simply reply to a letter you received.

Here are about two hundred of Stephen Fry's words after Type-O-Matic treatment. Originally published in Kingpin, the satirical chess magazine. Beneath the letter is an example of a typed envelope. 

Letter and envelope typed on a 1969 Olivetti Linea 88