[2] Some sources have suggested her to be the same person as the contemporary novelist Louisa Sidney Stanhope, but there is no evidence for this other than the fact that the countess is known to have been a great reader.
[1] Louisa was the daughter and sole heiress of Henry Grenville, a diplomat and politician, and his wife, the former Margaret Eleanor Banks.
He went on to state that the earl had settled £1500 a year on his wife in order to escape the threat of being openly accused of adultery.
Mrs Walburga Lackner, who had been taken on by the countess to give music lessons to her children, was left money in the earl's will.
John Pitt, 2nd Earl of Chatham, wrote to her eldest son on 10 March 1829 to express his condolences.