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A fine awakening. Down at 16:30, awake at midnight... well... five to. I stayed down until 1:30, with some effort. Finally had to wake, get up, get going. I left the window open a solid crack, say a third, quarter, the way up. It was 56, outside, when I went to bed. But a cold 56? Strange how 46 can seem warmer than some 56 F days, nights.
The air was good. Fresh, nice. Then I shut it about when I woke up. Give or take fifteen minutes? Memory, while sleeping, even right when waking, is... cloudy. Still, got a better night sleep, with fresh air coming in. And, strangely, it was warmer. Usually it is 59, lately, up there. With the window open? 64. Though, maybe, even with the door shut, it pulls heat up and through? Don't know.