Agnes Castle (c. 1860–1922) was a Victorian era Irish author who worked with both her sisters and husband.[1][2][3] The stories that she co-wrote were the basis of several plays and films. Life She was born Agnes Mary Frances Sweetman in County Dublin to Margaret Powell and Michael James Sweetman.[4] Her father died when she was a small child. The remaining family moved to Brussels in 1873 and she spent her summers in Switzerland. Her uncle was the novelist William Sweetman, while her sisters, Elinor Sweetman and M. E. Francis, were also writers.[5] With her sisters she began two family magazines: the "Ivy Home Magazine" and "Ivy Home Library".[1][6][7] Agnes married Egerton Castle in 1883 and co-authored many novels with her husband.[8][9] She also wrote plays for children, as well as stories for magazines such as Temple Bar, Cornhill Magazine, and Macmillan.[7] She has largely been ignored as a writer in favour of her husband. [10] Her daughter was Marie Louise Egerton Castle, also a writer, who became Countess de Meeûs, of Brussels when she married in 1922.[11 Less