During a visit to South Africa with her husband, Pethick-Lawrence read about
Christabel Pankhurst and
Annie Kenney's protest and unfurling a banner declaring "Votes for Women" at the
Manchester Free Trade Hall in October 1905, and their subsequent arrest. Back in Britain, Pethick-Lawrence became a member of the Suffrage Society and was introduced to
Emmeline Pankhurst by politician
Keir Hardie in 1906. Pethick-Lawrence became treasurer of the
Women's Social and Political Union (WSPU), which Pankurst had founded in 1903, and raised £134,000 over six years. Her husband and Keir Hardie also donated funds to pay off the organisations debts and she insisted that her friend and
chartered accountant Alfred Sayers be appointed to audit the WSPU finances. She also participated in the aborted visit to the Prime Minister in late June 1908, along with
Jessie Stephenson,
Florence Haig,
Maud Joachim and
Mary Phillips, after which there was some violent treatment of women protestors, and a number of arrests. , with Pethick-Lawrence listed as speaking In 1908, together with
Beatrice Sanders and Mrs Knight, Pethick-Lawrence organised WSPU's first
Week of Self-Denial, where supporters of the suffragette movement were asked to go without certain necessities for a week, donating the money saved to the WSPU. She chose the suffragette campaigning colours of purple, white and green. Pethick-Lawrence spoke at the Women's Sunday at Hyde Park on 21 June 1908, alongside
Flora Drummond,
Gladice Keevil,
Edith New, Emmeline Pankhurst, Christabel Pankhurst,
Adela Pankhurst, and other activists. and on 23 April 1909 she planted a tree at "Annie’s Arboretum."
Emily Blathwayt wrote in her diary that "it was a beautiful day for tree planting." She was arrested again in November 1911. It was adopted as the official newspaper of the
Women's Social and Political Union (WSPU), already the leading militant
suffragette organisation in the country.
, the suffragette newspaper founded by the Pethick-Lawrences|339x339pxIn April 1913, Frederick Pethick-Lawrence was made bankrupt after he refused to pay the £900 costs of the prosecutions of Emmeline Pethick-Lawrence, himself and Emmeline Pankhurst in the Old Bailey for conspiracy to commit property damage. The Irish Times noted that "this step does not mean that Mr Pethick-Lawrence is insolvent, because he is a wealthy man. ''The government sent
bailiffs to the Pethick-Lawrence's homes and when their belongings were auctioned most of their possessions were bought back by friends and supporters.
After being released from prison, the Pethick-Lawrences recuperated with Emmeline’s brother in Canada. Her sister Dorothy Pethick also left the WSPU in protest at their treatment, having previously taken part and been imprisoned for militant action. The Suffragette
replaced Votes for Women'' as the paper of the WSPU. == Pacifism and election campaigns ==