I am a little late on this one. On 14 June 1968 the Sunday Times Golden Globe Race started at Falmouth. Robin Knox-Johnston rounded Cape Horn on 17 January 1969, 20 days before his closest competitor Bernard Moitessier who abandoned the race. Thus, Knox-Johnston became the first man to circumnavigate the globe non-stop and single-handed on 22 April 1969, the day he returned to Falmouth. He donated his prize money to the family of Donald Crowhurst, who committed suicide during the race.
A short interview of Robin Knox-Johnston talking of his exploit and his ship Suhaili can be found here.