Mrs. Maud Ballingon Booth, of New York, founder and head of the Prison League, and general-in-chief of the Volunteers of America, will speak, under the auspices of the Ethical Society, in Emerson Hall on Tuesday, April 30, at 8 o'clock on "The Problems of Prison Life." Mrs. Booth has written some important books, including: "Branded," "Sleepy Time Stories," "Lights of Childland."