I'm not a huge fan of Jon Krakauer, but this little section from his book on the '96 Everest disaster has stuck with me for a decade.
"At 21,000 feet, I came upon a large object wrapped in blue plastic sheeting beside the trail. It took my altitude-impaired gray matter a minute or two to comprehend that the object was a human body. Shocked and disturbed, I stared at it for several minutes. That night when I asked Rob about it he said he wasn't certain, but he thought the victim was a Sherpa who'd died three years earlier.
For the next two days I mostly lay in my tent with my head in my hands, trying to exert myself as little as possible. Feeling slightly better on Saturday, I climbed a thousand feet above camp to get some exercise and accelerate my acclimatization, and there, at the head of the Cum, fifty yards off the main track, I came upon another body in the snow, or more accurately the lower half of a body. The style of the clothing and the vintage leather boots suggested that the victim was European and that the corpse had lain on the mountain at least ten or fifteen years.
The first body had left me badly shaken for several hours; the shock of encountering the second wore off almost immediately."