Discovering that much of the support for moderation came from women, the Temperance Union increasingly became active in advocating the cause of women’s suffrage, an area in which Sheppard quickly became prominent. Her interest in women’s suffrage, however, went beyond practical considerations regarding temperance: her views were made well known with her statement that “all that separates, whether of race, class, creed, or sex, is inhuman, and must be overcome.” Sheppard proved to be a powerful speaker and a skilled organiser, and quickly built support for her cause.
The Temperance Union presented a petition in favour of women’s suffrage to Parliament in 1891. It was supported in Parliament by John Hall, Alfred Saunders, and the Premier, John Ballance. Sheppard played a considerable part in organising the petition. A second petition, larger than the first, was presented the following year, and a third, still larger, was presented in 1893. That year, a women’s suffrage bill was successfully passed, granting women full voting rights. Sheppard herself was widely acknowledged as the leader of the women’s suffrage movement.
Sheppard had no time to rest, however, as the 1893 election was only ten weeks away. Along with the Temperance Union, she was highly active in getting women to register as voters. Despite the short notice, nearly two-thirds of women cast a vote.