Kathrada 's involvement in the anti-apartheid activities of the African National Congress ( ANC ) led him to his long-term imprisonment following the Rivonia Trial , in which he was held at Robben Island and Pollsmoor Prison .
Kathrada 's involvement in the anti-apartheid activities of the African National Congress ( ANC ) led him to his long-term imprisonment following the Rivonia Trial . He was held at Robben Island and Pollsmoor Prison with Nelson Mandela and Walter Sisulu .