United Nations mediator Sakari Tuomioja , the former Prime Minister of Finland , moderated the talks .
Former U.S. Secretary of State Dean Acheson served as mediator , but no representative from Cyprus was present to appear for either the Greek - speaking or Turkish - speaking Cypriots .
United Nations mediator Sakari Tuomioja , the former Prime Minister of Finland , moderated the talks , and former U.S. Secretary of State Dean Acheson served as mediator , but no representative from Cyprus was present to appear for either the Greek - speaking or Turkish - speaking Cypriots .