This collection contains papers that document several generations of the Martin, Campbell, and Furlong families with the Martin family receiving the most coverage. To a lesser extent, the Kennedy and Jenkins families, who had strong personal and mercantile ties to the Martin family, are also represented. These interrelated middle class Irish Catholic families from Philadelphia were involved in several prominent industries in the region, including overseas commerce. Devout in their religious beliefs, the families, the Campbells in particular, played a significant role in shaping Catholicity in Philadelphia. Members of the Campbell family were also actively involved in political and social movements of the nineteenth- and twentieth-centuries, including the labor movement and women's suffrage. Distinguished members of these families are represented, including suffragist and writer Sarah Jane Campbell (1844-1928). Items in the collection date from 1795 to 1939 with the majority of materials dating from the period 1825 to 1925. Most items are correspondence, family-oriented and personal in nature; also included are business, estate, and genealogical materials as well as a few photographs.