18 April 1964
Dr. Neville Alexander and four others were found guilty of sabotage and sentenced to ten years imprisonment. The judge found that the accused participated in the activities of the National Liberation Front (NLF),  an offshoot of the Yu Chi Chan Club (YCCC), whose aims was to advance the revolution through violence. Along with Namibian activists Kenneth and Tilly Abraham from the South West Africa People’s Organisation (Swapo), he created the YCCC to promote guerrilla warfare, and subsequently founded the (NLF) to bring together people who were committed to the ‘overthrow of the state, irrespective of their political ideology’. In 1974, Alexander was released from prison, but banned and placed under house arrest for five years.
References

 O’Malley, P. ‘1964’, from Nelson Mandela Centre of Memory, [online], available, at www.nelsonmandela.org.za (Accessed: 13 March 2013)|

South African History Online, ‘Dr. Neville Edward Alexander’, [online], available at www.sahistory.org.za (Accessed: 13 March 2013)