[5] Her work as treasurer was recognized in the History of Woman Suffrage published by Anthony and Elizabeth Cady Stanton.
[6] In volume VI of that publication it was noted that Sperry participated in a major suffrage conference in San Francisco in 1902.
[7] In a letter dated September 30, 1911, Sperry wrote to Hearst saying, ""I wish to acknowledge the pleasure it gave me at our recent Club meeting, when you told me that you favored 'Votes for Women.'
While serving as treasurer to the state suffrage association, for seven years,[8] Sperry wrote opinion articles advocating for the passage of what was known as Amendment 6.
[10] National suffragist Anna Howard Shaw was quoted on this failed campaign as saying "it was not a Waterloo; it was Bunker Hill.
[12] Sperry was involved in this organization from the beginning and worked with many other California suffragists including Gail Laughlin, Ellen C. Sargent, Alice L. Park and Minora Kibbe.
[15] In the early 1900s, Sperry served as president of the California Woman Suffrage Association where she organized hundreds of suffragists.
[19] In 1905, Mary Sperry presided over a major suffrage convention on Sutter Street in San Francisco.