Those Wild Wyndhams: Three Sisters at the Heart of Power is a 2014 book by Claudia Renton that examines the life of the Wyndham sistersâ Madeline Wyndham (1869âÂÂ1941), Pamela Wyndham (1871âÂÂ1928), and Mary Constance Wyndham (1862âÂÂ1937).