Chapter 4 explores the central role of Huguenot ministers in maintaining and nurturing this confessional network as part of an international collaboration with the Calvinist church, noble leaders, scholars and other agents. Considers the refugee experience and establishment of stranger churches abroad, the navigation of theological differences and the part played by cooperation and conflict, especially in the French church in London. Focuses on connections to cardinal Châtillon and Regnard/Changy as well as other ministers involved in, and identified through, the correspondence, such as Pierre Loiseleur de Villiers. In particular, establishes the pragmatic day-to-day challenges that Huguenot ministers faced in serving their communities at home and abroad alongside bonds of faith and amity and the handling of disagreements. The varied experience and careers of the ministers are also compared and contrasted, as are the roles of other agents, particularly scholars and diplomats. Diplomacy and the negotiation of alliances were vital to the upholding of the Protestant and Catholic causes as was the identification of plotting by the other side.