Notes:
On Sunday, 20 June 1965 Tony Maggs was competing in the Natal Winter Trophy, a Formula 2 event which was part of the 1965 Royal Show Races at the Roy Hesketh Circuit in Pietermaritzburg, KwaZulu-Natal, South Africa.

A steering knuckle broke on the John Willment Brabham BT10 - Cosworth he was driving during the race. Maggs' car was pitched off the track and into an area where spectators were not permitted, at an estimate speed of 120 mi/h (193 km/h). The car struck and killed Michael Twyman, an eight-year-old boy who was spectating the race from the prohibited zone near one of the circuit's bends.

Michael Twyman was said to be from Durban, South Africa, but it is unclear whether he was a native or a resident of that town. He was a South African citizen.

After the tragedy Maggs was distraught. In the accident he injured his shoulder and suffered severe concussion, recovering his consciousness later in hospital. He was cleared, at an inquest, of responsability for the death of the young spectator. The verdict was that the death was accidental and no blame was to be attached to anybody. Maggs decided to quit racing for good, and returned to farming in his native Soutpansberg region of the Northern Transvaal. The talented South African, then aged 27, made history by being the first driver of his country to compete for a factory team in an international Grand Prix. During his career he made twenty-five Formula 1 Grand Prix starts, between 1961 and 1965. His best finishes were two second places, both in the French Grand Prix, at Rouen in 1962 and at Reims in 1963, and a third place in the South African Grand Prix at East London in 1962, driving Cooper cars.

• Magazine MotorSport, issue of October 2008, page 76.
• Magazine Car, issue of August 1965, page 70 [M1].
• Newspaper Sports Argus - Birmingham, West Midlands, England, UK), issue of Saturday, 21 September 1965, page 26, article "BOY'S RACE TRACK DEATH 'ACCIDENTAL' ", retrieved by website http://search.findmypast.co.uk/ .
• Newspaper Coventry Evening Telegraph - Coventry, West Midlands, England, UK), issue of Friday, 24 September 1965, page 26, article "Driver Maggs Retires", retrieved by website http://search.findmypast.co.uk/ .
• Website The GEL Motorsport Information, by Darren Galpin, page http://www.silhouet.com/motorsport/drivers/maggs.html .
• Website Grand Prix, page http://www.grandprix.com/ns/ns21525.html
• Website AUTOSPORT, article "Tony Maggs, 1937-2009" by Edd Straw, page http://www.autosport.com/news/report.php/id/75844 .
• Website AUTOSPORT → Forums → The Nostalgia Forum, thread "Tony Maggs, posting by "Hieronymus", message http://forums.autosport.com/index.php?showtopic=110198&view=findpost&p=3699453 .
• Website Motorsport South Africa, article "Tony Maggs, South Africa’s Forgotten GP Ace" by Greg Mills, page http://www.motorsport.co.za/msa/NewsView.asp?ID=3948 .
• Website Old Racing Cars by Allen Brown, page http://www.oldracingcars.com/brabham/bt10/ .
• E-mail by Marius Matthee, dated 22 September 2004.
• Private message by Marius Matthee, dated 06 December 2007, citing [M1].
• E-mail by Marius Matthee, dated 07 December 2007, citing [M1].