When Nietzsche started going blind, he needed some help. Luckily, the first commercial typewriter had just been developed in Denmark: the Hansen Writing Ball (1870). Nietzsche once said that our writing tools are also working on our thoughts. So naturally, he wrote some leet poetry:
The Writing Ball is a thing just like me: of iron
And yet easy to twist, especially on journeys.
Patience and tact one must richly possess
And fine little fingers to use us.
If you really want to get down n’ dirty with this, check out the book about the restoration of Nietzsche’s text ballz.