<P> On April 28, 1992, McCandless hitchhiked to the Stampede Trail in Alaska . There he headed down the snow - covered trail to begin an odyssey with only 10 pounds (4500 g) of rice, a . 22 caliber rifle, several boxes of rifle rounds, a camera, and a small selection of reading material--including a field guide to the region's edible plants, Tana'ina Plantlore . He declined an acquaintance's offer to buy him sturdier clothing and better supplies . McCandless perished sometime around the week of August 18, 1992, after surviving more than 100 days . </P> <P> On September 6, 1992, Christopher McCandless' body was found inside an abandoned bus in Alaska (63 ° 52 ′ 06.23" N 149 ° 46 ′ 09.49" W ﻿ / ﻿ 63.8683972 ° N 149.7693028 ° W ﻿ / 63.8683972; - 149.7693028 Coordinates: 63 ° 52 ′ 06.23" N 149 ° 46 ′ 09.49" W ﻿ / ﻿ 63.8683972 ° N 149.7693028 ° W ﻿ / 63.8683972; - 149.7693028). One year later, author Jon Krakauer retraced McCandless' steps during the two years between college graduation and his demise in Alaska . McCandless shed his legal name early in his journey, adopting the moniker "Alexander Supertramp", after W.H. Davies . He spent time in Carthage, South Dakota, laboring for months in a grain elevator owned by Wayne Westerberg before hitchhiking to Alaska . Krakauer interprets McCandless' intensely ascetic personality as possibly influenced by the writings of Henry David Thoreau and McCandless' favorite writer, Jack London . He explores the similarities between McCandless' experiences and motivations, and his own as a young man, recounting in detail Krakauer's own attempt to climb Devils Thumb in Alaska . Krakauer also relates the stories of some other young men who vanished into the wilderness, such as Everett Ruess, an artist and wanderer who went missing in the Utah desert during 1934, at age 20 . In addition, he describes at some length the grief and puzzlement of McCandless' parents, sister Carine, and friends . </P> <P> McCandless survived for approximately 113 days in the Alaskan wilderness, foraging for edible roots and berries, shooting an assortment of game--including a moose--and keeping a journal . Although he planned to hike to the coast, the boggy terrain of summer proved too difficult, and he decided instead to camp in a derelict bus . In July, he tried to leave, only to find the route blocked by a snow - melt swollen river . On July 30, McCandless wrote a journal entry which reads, EXTREMELY WEAK . FAULT OF POT (ATO) SEED Based on this entry, Krakauer hypothesized that McCandless had been eating what he thought was the roots of an edible plant, Hedysarum alpinum, commonly known as wild Eskimo potato, which are sweet and nourishing in the spring but later become too tough to eat . When this happened, McCandless may have attempted to eat the seeds instead . Krakauer first speculated that the seeds were actually from Hedysarum mackenzii, or wild sweet pea, instead of the Eskimo Potato, which contained a poisonous alkaloid, possibly swainsonine (the toxic chemical in locoweed) or something similar . In addition to neurological symptoms, such as weakness and loss of coordination, the poison causes starvation by blocking nutrient metabolism in the body . However, Krakauer later suggested that McCandless had not confused the two plants and had in fact actually eaten Hedysarum alpinum . Krakauer had the plant tested for any toxins and, through tests on Hendysarum alpinum, it was discovered that it contained an unidentifiable form of toxin . </P> <P> According to Krakauer, a well - nourished person might consume the seeds and survive because the body can use its stores of glucose and amino acids to rid itself of the poison . Since McCandless lived on a diet of rice, lean meat, and wild plants and had less than 10% body fat when he died, Krakauer hypothesized that McCandless was likely unable to fend off the toxins . However, when the Eskimo potatoes from the area around the bus were later tested in a laboratory of the University of Alaska Fairbanks by Dr. Thomas Clausen, toxins were not found . Krakauer later modified his hypothesis, suggesting that mold of the variety Rhizoctonia leguminicola may have caused McCandless's death . Rhizoctonia leguminicola is known to cause digestion problems in livestock, and may have aided McCandless's impending starvation . Krakauer hypothesised that the bag in which Chris kept the potato seeds was damp and the seeds thus became moldy . If McCandless had eaten seeds that contained this mold, he could have become sick, and Krakauer suggests that he thus became unable to get out of bed and so starved . His basis for the mold hypothesis is a photograph that shows seeds in a bag . Following chemical analysis of the seeds, Krakauer now believes that the seeds themselves are poisonous . </P>

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