Who is Lady Elspeth Morrison Flashman from Flashman & the Angel of the Lord: From the Flashman Papers, 1858-59 and what is their importance? "Flashman_&_the_Angel_of_the_Lord:_From_the_Flashman_Papers

Narrator Sir Harry Flashman's beautiful but brainless wife, Elspeth is much on Flashy's mind after a long separation while serving in India. Flashy is far fonder of her than in most of his papers, although he is rather certain that she is having an affair with the Prince of Wales.