INMATE 46664Mandela was confined to the harsh Robben Island prison off the coast of Cape Town for most of his time behind bars. He and others quarried limestone there, working seven hours a day nearly every day for 12 years, until forced labor was abolished on the island. In secret, Mandela - inmate No. 46664 - wrote at night in his tiny concrete-floored cell.
It was forbidden to quote him or publish his photo, but go-betweens ferried messages from prisoners to anti-apartheid leaders in exile. Prisoners gathered in small groups for Socratic seminars, and Mandela offered lessons on the movement to guards he thought would be open to persuasion. All the guards were white; all the prisoners were black, mixed race, or Asian.