During the divestment from South Africa movement in the late 1980s, student activists erected a symbolic "shantytown" on Harvard Yard and blockaded a speech given by South African Vice Consul Duke Kent-Brown. The Harvard Management Company repeatedly refused to divest, stating that "operating expenses must not be subject to financially unrealistic strictures or carping by the unsophisticated or by special interest groups.
What South African Vice Consul did Harvard students blockade the speech of? 
South African Vice Consul Duke Kent-Brown.