This essay examines why Richard Henry Dana III and other Boston reformers supported the Massachusetts civil service law of 1884, an even stronger measure than the federal Pendleton Act of 1883. Historians have uncovered two purposes behind civil service reform. First, reform limited the “spoils system” and curtailed the power of political parties. Second, reform increased efficiency in government. This essay argues that restricting the suffrage of Irish laborers was another purpose. Therefore, the essay runs counter to prevailing historical opinion by demonstrating that support for suffrage restriction remained an undercurrent in the 1880s, even after the failure of the Tilden Commission to implement property qualifications in New York City in the late 1870s. This exploration of a neglected topic also reminds urban historians of the deep ethnic conflict that gripped Boston in the 1880s and of the crucial role of patronage and bossism in Boston and other cities, a reality that historians since the 1980s have tended to downplay.