To Lady Olivia Sparrow, 27 August 
Address: Southampton [Beneath the address, in the same hand, is written] I. H. Addington. [In a different hand, in red ink] No 20 Park Lane/ London
Postmark: [Partial] 30AU30/1817
Seal: Black wax
a one leg cut off, and the other seems threatening the same calamity) that one cannot but feel a particular interest for the Mother. She is entirely devoted
to religion, and lives in so profound a retirement that I am afraid it will not be
good for the young Lord who accompanied /her./  I have been pleading for the young people, who being only children cannot be expected
to be quite so abstracted as she wishes. The eldest girl is very pious and to her, confinement is no hardship. I have run on this long to account for the very short
time /I shall have/ to desire you to thank Mr. Obins for his very kind letter, and to thank you my very dear Lady Olivia for your very
kind few lines; but I must request you not to think I am so unreasonable as to expect
even a single line from your own hand till your heart is more at ease.
Adieu my dearest Lady Olivia,
Your faithful and affectionate
Adieu my dearest Lady Olivia,
The letter is dated on the basis of the postmark and contextual information.
Lady Southampton had two daughters, but it has not been possible to determine what lay behind their unfortunate condition.
Charles Fitzroy, third Baron Southampton (1804-72), had inherited his father’s title aged only six.
This is likely a reference to the declining health of Lady Olivia’s only son, Robert. On doctor’s orders he was shortly after taken abroad, to the south of France, where he died the following year.
The Dr Stewart recommended by More is very likely the same man attracting praise in The Monthly Gazette of Health 8 (1823). Read on Google Books
Hugh Percy, second Duke of Northumberland (1742-1817). He had two daughters: Lady Emily Frances, and Lady Agnes Percy.
Isabella Graham, The power of faith exemplified in the life and writings of the late Mrs. Isabella Graham (New York, 1816). (Read at the Internet Archive)
Memoir of the Early Life of William Cowper, Esq. Written by himself, and never before published. With an appendix, containing some of Cowper's religious letters, and other interesting documents, illustrative of the memoir (London: Printed for the editor, & sold by E. Cox & Son, 1816).(Read at the Hathi Trust)
Thomas Chalmers, The Evidence and authority of the Christian Revelation (Edinburgh: Blackwood, Oliphant, Waugh, and Innes, 1817). See ( Read at the Internet Archive)
Possibly Thomas White, Sermons preached at Welbeck chapel, St. Mary-le-bone (1817)(Read on Google Books), and James Bean, Parochial Instruction: or, Sermons delivered from the pulpit, at different times, in the course of thirty years (London: F. C. & J. Rivington, 1817). (Read on Google ooks)
It has not been possible to identify this text.
Reverend Richard Warner, vicar of Norton St Philip near Frome in Somerset. In her correspondence with Zachary Macaulay in November 1817, Warner’s dislike of evangelical ‘gloominess’ is commented upon. See 21 Nov 1817 to Zachary Macaulay (Read on Google Books)
Notice of Warner’s sermon, preached on 2 June, also appeared in the London reviews. See The Critical Review 5 (1817), p, 649 (Read on Google Books)
John Fisher had recently been released from his role as tutor to the heir presumptive, Princess Charlotte, a position he had held since 1805. She was at this time heavily pregnant with her first child, but would die shortly after giving birth, on 6 November 1817.