This project addresses one neglected type of social movement: humanitarian mobilization to protest against the suffering of distant strangers. A striking 19th century case of such mobilization is examined: the campaign around "the Bulgarian atrocities" in 1876 in Great Britain when more than five hundred public meetings were held to protest against the violent treatment of Bulgarians by Ottoman authorities. What structural factors and conjunctures of events were necessary to trigger off the campaign? How did different domestic and international fields interact in the course of the public mobilization? To answer these question I propose to explore secondary literature and archival sources by drawing on the theoretical and methodological framework of social movement research.