In February 1953 the first of the four Intercontinental Conferences of the Holy Year that commemorated Baha'u'llah's incarceration in the Siyah-Chal and the Birth of the Baha'i Revelation was held in Kampala, Uganda. There the Guardian's Ten Year World Crusade was launched. Convened by the British National Assembly, Hasan Balyuzi, the Assembly's chairman; John Ferraby, its secretary; and Dorothy Ferraby, a member of the National Assembly and secretary of the Africa Committee, attended that auspicious conference. (The Baha’i World In Memoriam 1992-1997, p. 138)