Three months of camp life on Lake Tahoe would restore an Egyptian mummy to his pristine vigor, and give him an appetite like an alligator. I do not mean the oldest and driest mummies, of course, but the fresher ones. The air up there in the clouds is very pure and fine, bracing and delicious. And why shouldn't it be?—it is the same the angels breathe. I think that hardly any amount of fatigue can be gathered together that a man cannot sleep off in one night on the sand by its side.

Roughing It, Part 3., by Mark Twain (Samuel Clemens)