This book reconstructs American consular activity in Ireland from 1790 to 1913 and elucidates the interconnectedness of America’s foreign interests, Irish nationalism and British imperialism. Its originality lies in that it is based on an interrogation of American, British and Irish archives, and covers over one hundred years of American, Irish and British relations through the post of the American consular official while also uncovering the consul’s role in seminal events such as the War of 1812, the 1845-51 Irish famine, the American Civil War, Fenianism and mass Irish emigration. It is a history of the men who filled posts as consuls, vice consuls, deputy consuls and consular agents. It reveals their identities, how they interpreted and implemented US foreign policy, their outsider perspective on events in both Ireland and America and their contribution to the expanding transatlantic relationship. The work intersects diaspora studies, emigration history and diplomatic relations as well as illuminating the respective Irish-American, Anglo-Irish and Anglo-American relationships.