With her sister Cicely and friends, she founded the Younger Suffragists in 1901. After deciding against teaching, she was appointed Secretary of the National Union of Women's Suffrage Societies in 1907. She served as President of the International Woman Suffrage Alliance from 1923 to 1946. She received an honorary LLD at Mount Holyoke College, USA, in 1937 in recognition of her international work. In 1942 she went on a government propaganda mission to Sweden.
^Sybil Oldfield, 'Eckenstein, Lina Dorina Johanna (1857–1931)', Oxford Dictionary of National Biography, Oxford University Press, 2004; online edn, September 2014 Profile, oxforddnb.com; accessed 1 October 2015.
^Cullen, Pamela V., A Stranger in Blood: The Case Files on Dr John Bodkin Adams, London, Elliott & Thompson, 2006; ISBN 1-904027-19-9