This five-volume set brings together the surviving letters penned by Harriet Martineau, the nineteenth-century writer and women’s rights advocate. Throughout her fifty-year career, Harriet Martineau's prolific literary output was matched only by her exchanges with a range of high-profile British, American and European correspondents. This set focuses on the letters written by Martineau, contextualising the correspondence through annotation of the highest standard. This book is a unique and highly valuable resource for students of, and others interested in, the history of feminism.