Nyctography

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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.

Carroll invented the Nyctograph and Nyctography because he was often awakened during the night with thoughts that needed to be written down immediately, and didn't want to go through the lengthy process of lighting a lamp just to have to extinguish it shortly thereafter.