Joining the ANC, he was increasingly influenced by Sisulu, spending time with other activists at Sisulu's Orlando house, including his old friend Oliver Tambo.
Setelah bergabung dengan ANC, Mandela semakin dipengaruhi Sisulu dan menghabiskan waktunya bersama aktivis lain di rumah Sisulu di Orlando, termasuk teman lamanya Oliver Tambo.