Though perhaps 150, 000 died of exhaustion or disease, some walked right across Congo and reached Congo-Brazzaville.

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Their journey began near the vineyards where a 17-year-old undocumented farmworker died of heat exhaustion last month.

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The siblings claimed Siverls died of heat exhaustion during an endurance hike up a mountain in 90-degree weather with virtually no food or water and wearing a backpack filled with 40 pounds of rocks.

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During the same season as Bunting's army expedition, David Sharp, a 34-year-old British climber died of cold, exhaustion and lack of oxygen on his descent from the summit.

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