She left school at 14 and worked for some time[6] before and, in 1900, she married a working-class man, Joshua William Cullen, who was sympathetic to the call for women to have the right to vote.

[3] Cullen was arrested following the 1908 attempt by suffragettes to rush into the House of Commons hidden in a pantechnicon[7] to get their voices heard on women's suffrage.

[5] Cullen was encouraged to go for a few days to 'rouse' people to have a crowd ready to greet Winston Churchill, on his speech-giving in Norwich, in a 17 July 1909 letter from Christabel Pankhurst.

[11] Cullen also gave practical assistance to young women alone in the city, setting up the Wayfarers social club to create a welcoming community.

[11] In 1953, Cullen donated items to the national collection, to commemorate 50 years of women's right to vote in Australia,[11] including the Holloway Medal, a portcullis brooch with the WPSU ribbon colours of green, white and purple, designed and presented to her by Christabel Pankhurst.

[16] Cullen had her portrait photograph taken with the WSPU illustrated certificate, wearing her Votes for Women sash in 1958, in the National Library of Australia collection.

[20] The collection has the original certificate from Emmeline Pankhurst, honouring Louise Cullen's contribution of "self-forgetfulness and self-conquest, ever ready to obey the call of duty, and to answer to the appeal of the oppressed",[21] which she is holding in her portrait.