Jane Williams was a London-born historian and miscellaneous writer. She spent many years of her life in Brecon, Wales and as a result developed a friendship with the famous cultural sponsor and supporter Augusta Hall, or Lady Llanover. Thereafter Williams took a great interest in Welsh literature and learnt the language. She published many important volumes including ‘A History of Wales derived from authentic sources’ (1869). This book is a compilation of her most ambitious work, and in spite of its defects, was not superseded until the publication of Sir John E. Lloyd’s researches on the history of Wales in the late nineteenth century.