Unchinked log cabins expose sleepers to freezing mountain air.

Evidence

My room is nearly the open air, being built of unchinked logs, and, as in the open air, one requires to sleep with the head buried in blankets, or the eyelids and breath freeze. — Isabella L. Bird, A Lady’s Life in the Rocky Mountains, 226

Categorization

• CANDY: Sleeping with your head under blankets or your eyelids freeze — a great elevator fact about Rocky Mountain cabin life.
• XREF: Deepens the reader’s picture of her daily domestic life in the high country.