By 1975, Mandela had become a Class A prisoner, allowing greater numbers of visits and letters; he corresponded with anti-apartheid activists like Mangosuthu Buthelezi and Desmond Tutu.
Mandela had become a Class A prisoner. This was by 1975. A prisoner was allowing greater numbers of visits and letters. He corresponded with anti-apartheid activists like Mangosuthu Buthelezi. He corresponded with anti-apartheid activists like Desmond Tutu.