 Robin Williams' book "Sweet Swan of Avon" published by Wilton Circle Press, USA, documents the Countess's fascinating life as well as those of her two sons (see below).William Herbert, 3rd Earl of Pembroke (1580–1630), eldest son of the 2nd Earl and his famous countess, was a conspicuous figure in the society of his time and at the court of James I.Several times he found himself opposed to the schemes of the Duke of Buckingham, and he was keenly interested in the colonization of America.