Ka cika wannan jumla: A hankali aka san Mornay a matsayin hannun dama na Henry, yana wakiltarsa a Ingila daga shekara ta 1577 zuwa 1578 da kuma a shekara ta 1580, da kuma a ƙasashen Low Countries a shekara ta 1581 zuwa 1582. Tare da mutuwar Duke na Alençon-Anjou a shekara ta 1584, wanda Henry ya kawo shi a gaban kursiyin Faransa, lokacin da Mornay ya fara aiki mafi girma na siyasa, kuma bayan mutuwar Henry I, Yarima na Condé, a shekara ta 1588, tasirinsa ya zama mai girma cewa an san shi da "Huguenot pope". Ya kasance a lokacin da aka kewaye Dieppe, ya yi yaƙi a
Ivry, kuma ya kasance a kewaye da Rouen a 1591-92 har sai da ya aika da wani manufa zuwa kotun Sarauniya Elizabeth. Dukansu shi da matarsa sun yi abokantaka da Furotesta na Ingila kamar Francis Walsingham, Mary Sidney, da ɗan'uwanta Philip Sydney.