Sebastian Edward Farquharson Snow, (21 January 1929 – 20 April 2001), born in Midhurst, Sussex, was an English adventurer who is notable for his explorations of the Amazon River.
This was not ground-breaking news, however, since Ninococha's status as the ultimate source of the Amazon was something previous French explorers to the region had posited on good evidence.
[3] Beginning in 1973 in the Argentinian city of Ushuaia, Snow set out to walk the length of the Americas, from Patagonia to Alaska along the Pan-American Highway, a distance of some 15,000 miles.
His travel companion during the gruelling and dangerous traversal of the Darién Gap was a young Canadian, Wade Davis, later to gain fame in his own right as an ethno-botanist and author.
[4] Severe health problems forced him to take a break shortly after crossing the Darién Gap, but a few months later Snow resumed his journey from the precise point in Costa Rica at which it had been interrupted.