his letter is part of a series of correspondence belonging to Lady Londonderry, a large proportion of which concerns Sir Edward Carson and opposition to the Third Home Rule Bill. Lady Londonderry was a prominent figure in politics and high ­society from 1890 until 1919. Her correspondence includes many important figures in literature, the arts, the military, law and the church.This letter was written by Lady Anne Lambton (1870-1922), to Lady Londonderry (1856 - 1919).Lady Londonderry was the wife of Charles Stewart Vane-Tempest-Stewart (1852 - 1915), sixth marquess of Londonderry, and was herself an active figure in British politics.In this letter Anne gives details of a planned visit by 'Jack' (probably Anne's brother John Lambton, 3rd Earl of Durham) to see a stud horse, and gives her regrets that she will not be available to join him.