Through all these scenes, the Lady of Hardwicke still pursued her settled purpose. Her husband complained that he was "never quiet to satisfy her greedie appetite for money for purchases to set up her children." Her ambition was equally insatiate, and generally successful: but in one memorable instance she overshot her mark. She contrived (unknown to her lord) to marry her favourite daughter, Elizabeth Cavendish, to Lord Lennox, the younger brother of the murdered Darnley, and consequently standing in the same degree of relationship to the crown. Queen Elizabeth, in the extremity of her rage and consternation, ordered both the dowager Lady Lennox and Lady Shrewsbury to the Tower, where the latter remained for some months; we may suppose, to the great relief of her husband. He used, however, all his interest to excuse her delinquency, and at length procured her liberation. But this was not all. Elizabeth Cavendish, the young Lady Lennox, while yet in all her bridal bloom, died in the arms of her mother, who appears to have suffered that searing, lasting grief which stern hearts sometimes feel. The only issue of this marriage was an infant daughter, that unhappy Arabella Stuart, who was one of the most memorable victims of jealous tyranny which our history has recorded. Her very existence, from her near relationship to the throne, was a crime in the eyes of Elizabeth and James I. There is no evidence that Lady Shrewsbury indulged in any ambitious schemes for this favourite granddaughter, "her dear jewel, Arbell," as she terms her;[49] but she did not hesitate to enforce her claims to royal blood by requiring 600_l._ a year from the treasury for her board and education as became the queen's kinswoman. Elizabeth allowed her 200_l._ a year, and this pittance Lady Shrewsbury accepted. Her rent-roll was at this time 60,000_l._ a year, equal to at least 200,000_l._ at the present day. The Earl of Shrewsbury died in 1590, at enmity to the last moment with his wife and son; and the Lady of Hardwicke having survived four husbands, and seeing all her children settled and prosperous, still absolute mistress over her family, resided during the last seventeen years of her life in great state and plenty at Hardwicke, her birth place. Here she superintended the education of Arabella Stuart, who, as she grew up to womanhood, was kept by her grandmother in a state of seclusion, amounting almost to imprisonment, lest the jealousy of Elizabeth should rob her of her treasure.[50]