Rarefied mountain air saps evening mental energy while sharpening observation

Evidence

It is difficult to make this anything of a letter. I have been riding for a whole week, seeing wonders and greatly enjoying the singular adventurousness and novelty of my tour, but ten hours or more daily spent in the saddle in this rarefied, intoxicating air, disposes one to sleep rather than to write in the evening, and is far from conducive to mental brilliancy. The observing faculties are developed, and the reflective lie dormant. — Isabella L. Bird, A Lady’s Life in the Rocky Mountains, 359

Categorization

  • XREF: connects to: Winter’s scarcity of distractions enables attentive and speculative observation — Aldo Leopold, A Sand County Almanac: With Other…, 18; High-altitude Sierra sunsets produced an overwhelming emotional spectacle that slowed her passage — Isabella L. Bird, A Lady’s Life in the Rocky Mountains, 39