Elizabeth Heyrick fought fiercely for the rights of oppressed people. After a disastrous marriage, she became a prolific pamphleteer, a Quaker and one of the most outspoken anti-slavery campaigners of her time. Despite renewed contemporary interest in slavery, and in the stories of those who opposed it, female abolitionists are still much less well known than their male counterparts. Yet they were often more radical and more daring. Heyrick defied male authority and she led others in challenging William Wilberforce and his colleagues to fight for the immediate rather than the gradual abolition of slavery. This book is the first full length biography of Elizabeth Heyrick and it sets her life in the context of the British anti-slavery movement of the eighteenth and early nineteenth centuries. She was a woman who dared to put her head above the parapet and to call out those responsible for one of the worst abuses of human rights in history. She was courageous, loyal and uncompromising, and did not suffer fools gladly. It was not until long after her death in 1831 that her contribution to the anti-slavery cause started to be recognised and even today, she remains hidden in the shadows of the movement. Using archival records and recently unearthed family materials, as well as contemporary fiction and memoirs, the author creates a compelling account of an unsettled life set in turbulent times.