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It's attested to by Dickens, but most Victorians wouldn't be able to afford to keep fires burning all night long, especially in bedrooms. We don't have heating at night in England. It's too expensive and would get too warm. If you're under thick covers, you don't need it. They would have warming pans in their beds in Dickey's time. These days our winters are milder, but when In was a kid we had electric blankets, which we switched off once we were in bed. Some families just used hot water bottles.
Various periods have been referred to in the thread.
I've never heard of primitive peoples sleeping in two halves and it seems they don't.