LUCUBRATION

lucubration. Lucubration, n. a nightly study or work from it

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Lu′cu‐bra″tion (?), n. [[l. lucubratio;cf. F. lucubration.]] 1. 1. The act of lucubrating, or studying by candlelight; nocturnal study; meditation.
After long lucubration I have hit upon such an expedient. Goldsmith. 2. 2. That which is composed by night; that which is produced by meditation in retirement; hence (loosely) any literary composition.
Thy lucubrations have been perused by several of our friends. Tatler.