Henry Mayer's 1915 illustration was the centerfold of a special suffrage issue of Puck magazine (v.77, no. 1981 (1915 February 20)), centerfold (pp. 14-15), guest-edited by New York state suffrage groups.
All the information on these major suffrage leaders is taken from "Women Who Fought for the Vote," History.com, August 14, 2020.
Jane Addams (1860-1935)
Susan B. Anthony (1820-1906)
Elizabeth Cady Stanton (1815-1902)
Mary Church Terrell (1863-1954)
Lucy Stone (1818-1893)
Alice Paul (1885-1977)
Sojourner Truth (1797-1893)
Ida B. Wells (1862-1931)
Francis E.W. Harper (1825-1911)