This reminds me of an article I read years ago about how people used to commonly wake up in the middle of the night, before the advent of electric bulbs, and of

This reminds me of an article I read years ago about how people used to commonly wake up in the middle of the night, before the advent of electric bulbs, and often get a waking period between sleep in two phases (I assume more in winter months than in summer due to daylight hours). Apparently it was a very popular time for writing by candlelight, and I'm sure the creativity enjoyed by some of this tendency toward hynagogia had plenty to do with it.