Nyctography

Nyctography is a form of shorthand writing created by Charles Lutwidge Dodgson (better known as Lewis Carroll) in 1891.
Nyctography is written with a nyctograph (also invented by Carroll) and uses a system of dots and/or strokes all based on a dot placed in the upper left corner. Using the Nyctograph, one could quickly jot down ideas or notes without the aid of light.