William Harrison Ainsworth (4 February 1805 – 3 January 1882) was an English historical novelist born in Manchester. He trained as a lawyer, but the legal profession had no attraction for him. While completing his legal studies in London he met the publisher John Ebers, at that time manager of the King's Theatre, Haymarket. Ebers introduced Ainsworth to literary and dramatic circles, and to his daughter, who became Ainsworth's wife.