Mary Dreier was an American social reformer in New York.
Six women including Mary Dreier, Ida Rauh, Helen Marot, Rena Borky, Yetta Raff, and Mary Effers link arms as they march to City Hall on December 3, 1909, during the New York shirtwaist strike to demand an end to abuse by police.
Margaret Dreier Robins was an American labor leader and philanthropist.
Robins in 1919
Sketch by journalist Marguerite Martyn, with her reaction to the interview, 1910