The Gadfly is a novel by Irish-born writer Ethel Voynich, published in 1897, set in 1840s Italy under the dominance of Austria, a time of tumultuous revolt and uprisings. The story centres on the life of the protagonist, Arthur Burton. A thread of a tragic relationship between Arthur and his love, Gemma, simultaneously runs through the story. It is a tale of faith, disillusionment, revolution, romance, and heroism.