The troubles of George III were not exclusively the result of his incursions into politics, for he had much worry in connexion with most of his brothers and sisters, sometimes through their fault and sometimes through the circumstances in which they were placed. Exclusive of his heir, Frederick, Prince of Wales, left behind him six children. His youngest son, Frederick William, died in 1765 at the age of fifteen; "an amiable youth and the most promising, it was thought, of the family. The hereditary disorder in his blood had fallen on his lungs and turned to a consumption."[122] A daughter, Louisa Anne, fell a victim to the same disease three years later; but this was a happy release, for, afflicted with bodily disease from her infancy, she was so remarkably small for her age that though she had completed her nineteenth year, she looked like a child of about thirteen.[123] There remained the Dukes of York, Gloucester, and Cumberland, and the Princesses Augusta and Caroline Matilda. [122] Walpole: _Memoirs of George III_. [123] _Ibid._ The Princes probably inherited from their father a love of pleasure, and this had doubtless been quickened by the restrictions imposed upon them when they were in the custody of the Princess Dowager. She kept them in such rigid durance that when Prince Henry, a lively lad, was asked if he had been confined with the epidemic cold, he replied: "Confined, that I am, but without any cold." It was, therefore, only to be expected that as soon as the boys could escape from leading-strings, they would kick over the traces, and plunge gaily and unthinkingly into all the pleasures that await princes in this world. Edward Augustus, afterwards Duke of York, as the eldest of the brothers, was the first to secure his liberty. "Sir Charles [Hanbury Williams]'s daughter, Lady Essex,[124] has engaged the attention of Prince Edward, who has got his liberty, seems extremely disposed to use it, and has great life and good-humour; she has already made a ball for him," Walpole wrote to Sir Horace Mann in January, 1757, when the Prince was eighteen; and soon William Henry, afterwards Duke of Gloucester, and Henry Frederick, Duke of Cumberland, made their bow to society, and became much in evidence. "Every place is like one of Shakespeare's plays: Enter the Dukes of York, Gloucester, and attendants." [124] Charlotte, Countess of Essex. The Duke of York was of an amorous disposition and at an early age had love passages with the Duchess of Richmond,[125] with Lady Stanhope,[126] and with the Countess of Tyrconnel, of the last of whom Wraxall has left a description: "my particular acquaintance, feminine and delicate as her figure, very fair, with a profusion of light hair."[127] The Duke was further said to be engaged to that Lady Mary Coke of whom Lady Temple wrote: