She was not as active as her sister, Millicent Garrett Fawcett, though Garrett Anderson became a member of the Central Committee of the National Society for Women's Suffrage in 1889.
Kız kardeşi Millicent Garrett Fawcett kadar aktif değildi, buna rağmen Garret Anderson, 1889'da Ulusal Kadın Hakları Meclisi Merkez Komitesinin bir üyesi oldu.