To sail solo 4,000 miles at 200 miles a day. This is the task that Chichester set himself in his 70th year.
You want to see if you can do it - you get involved and you can't rest until you've had a bash at it. That's how adventure comes to most men, I think.
Sir Francis's attempt at the 'four-minute-mile of sailing' took him from Bissau in Portuguese Guinea to the coast of Nicaragua.
(OAP Superman: page 9)