One of the modern breed of explorers who crossed Africa's Sahara desert on the back of a camel.
He recorded his journey with both writing and photographs.
He was the first non-African to cross the Sahara without motor transport, which he did with the help of the native Touareg tribesmen.
His parents were English and Irish.
Like Ed Stafford, who walked the entire length of the Amazon river and wrote about it, Curl combined exploration with extreme endurance.