Various drafts by Mackintosh of a summary history of the manor of Kensington from the Norman Conquest, and of Holland House itself from its building until the late eighteenth century.
John Henry Petty, Earl Wycombe, 2nd Marquess of Lansdowne: Letters to Lord Holland. Holland's autograph list of the letters, giving date and subject, 'Contents of Book marked W/N I', watermark 1810 (f. 2) is ff. 1-13, with a copy at ff. 14-26, watermark 1809 (f. 21).
John Henry Petty, Earl Wycombe, 2nd Marquess of Lansdowne: Letters to Lord Holland. Includes (ff. 135-159) Lansdowne's Eulogy of George Washington, incipit 'Friends and Fellow Citizens/The father of your country is at length no more ...'; 'Dublin, 14 Mar. 1800' (f. 159).
Mrs F. M. Wyndham: Letters to Lady Holland. Preceded (f. 1) by a letter of her husband, Hon. William Frederick Wyndham, Envoy and Minister to Tuscany, to Lady Webster, afterwards Lady Holland, 1790.
Mrs F. M. Wyndham: Letters to Lady Holland. Includes (ff. 22v-23, 72v, 177-179, 203-203v) letters of John Henry Petty, Earl Wycombe, 2nd Marquess of Lansdowne, to Lady Holland, 1798.