Sir Ross began his study of malaria in 1892. He discovered the transmission of malaria in humans through the Anopheles mosquito in 1897. Sir Ross continued his research and visited various countries including West Africa, Panama and other countries advising and aiding in the extermination of malaria. In 1902 he received the Nobel Prize in medicine for his discovery. Sir Ross authored a book, The prevention of Malaria, in 1910.
While Sir Ross is known for his work on malaria, he is also remembered as a mathematician, editor and novelist. He was the Director-in Chief of the Ross Institute until his death in 16 September 1932.
At the end of his sentence, Parliament enacted a General Law Amendment Act, which empowered the Minister of Justice to prolong the detention of any political prisoner indefinitely. Subsequently, Sobukwe was moved to Robben Island, where he remained for an additional six years.
The Minister of Justice, Jimmy Kruger, announced that Sobukwe was being released from detention on 13 May 1969. On his release, Sobukwe was allowed to join his family in Galeshewe, Kimberley. However, he still remained under twelve-hour house arrest under the Suppression of Communism Act of 1950.
Sobukwe was therefore prohibited from taking part in political activities as result of the banning order, and as such could not be quoted by any person or by the press. During his incarceration Sobukwe obtained an Honours Degree in Economics from the University of London, and also began studying for a Law Degree.