| RefNo | Title |
| KMAN1/A/49/7/18 | Extract from a letter to the Duke of Manchester from the Duchess of Manchester |
| KMAN1/A/49/7/19 | Extract from a letter to the Duke of Manchester from the Duchess of Manchester |
| KMAN1/A/49/7/20 | Extract from a letter to the Duke of Manchester from the Duchess of Manchester |
| KMAN1/A/49/7/21 | Unsigned letter to the Duke of Manchester |
| KMAN1/A/47/8/5 | Account of Samuel Pepys Cockerell, architect, for works carried out at Manchester House between 1784 and 1795 |
| KMAN1/A/49/9/2 | A Scheme for the Perpetual Agreement and Alliance between His Grace the Duke of Manchester and Coulson Fellowes Esq. |
| KMAN1/A/49/7/9 | Letter to the Duke of Manchester from F. Otway, Riverhill [Kent] |
| KMAN1/A/49/9/3 | Letter to the Duke of Manchester from his brother, Lord Charles Montagu, Kingston, Jamaica |
| KMAN1/A/47/8/3 | Bill presented to the Dowager Duchess of Manchester as administratrix of the estate of George late Duke of Manchester |
| KMAN1/A/43/5 | Two title deeds to the Manchester estates |
| KMAN1/A/47/8/4 | Lawyer's bills relating to a mortgage debt secured by the Duke of Manchester on the fee farm rent issuing out of the Manor of Spaldwick |
| KMAN1 | Records of the Montagu family of Kimbolton Castle |
| KMAN1/A/49/7/17 | Letter to the Duke of Manchester from the Duchess of Manchester |
| KMAN1/A/17/4/14/2a | Letter to the Duke of Manchester from Charles Alexandre de Calonne, Paris [France] |
| KMAN1/A/21B/6/5 | Letter to the Duke of Manchester from the Duchess of Manchester |
| KMAN1/A/21B/6/2 | Letter to the Duke of Manchester from the Duchess of Manchester |
| KMAN1/A/21B/6/3 | Letter to the Duke of Manchester from the Duchess of Manchester |
| KMAN1/A/20B/12 | Two copy letters to George, 4th Duke of Manchester, from Marie Antoinette and Louis XVI, Versailles [France] |
| KMAN1/A/21B/6/13 | Extract from a letter to the Duke of Manchester from the Duchess of Manchester, Paris |
| KMAN1/A/21B/6/4 | Letter to the Duke of Manchester from the Duchess of Manchester |
| KMAN1/A/21B/6/6 | Letter to the Duke of Manchester from the Duchess of Manchester, Paris |
| KMAN1/A/21B/6/8 | Letter to the Duke of Manchester from the Duchess of Manchester, Paris |
| KMAN1/A/21B/6/7 | Letter to the Duke of Manchester from the Duchess of Manchester, Paris |
| KMAN1/A/21B/6/1 | Letter to the Duke of Manchester from the Duchess of Manchester |
| KMAN1/A/21B/6/9 | Letter to the Duke of Manchester from the Duchess of Manchester, Paris |
| KMAN1/A/21B/6/12 | Letter to the Duke of Manchester from the Duchess of Manchester, Paris |
| KMAN1/A/21B/6/10 | Letter to the Duke of Manchester from the Duchess of Manchester, Paris |
| KMAN1/A/21B/6/11 | Letter to the Duke of Manchester from the Duchess of Manchester, Paris |
| KMAN1/A/22A/5 | Title deeds to Montagu properties in Northamptonshire and Huntingdonshire |
| KMAN1/A/22a/14 | Papers relating to the debts of the late George, 4th Duke of Manchester |
| KMAN1/A/32/5/50 | List of the children of Robert late Duke of Manchester and of his duchess Harriet nee Dunch |
| KMAN1/A/32/7/25 | Letter to the Duke of Manchester from Ann Lady Corke and Orrery, Queen Street |
| KMAN1/A/23/2 | Administration of the estate of the late George Duke of Manchester, who died intestate |
| KMAN1/A/47/8/13 | Papers relating to the estate of George, late 4th Duke of Manchester |
| KMAN1/A/49/7/2 | Letter to the Duke of Manchester from Joseph York, Hague [Netherlands] |
| KMAN1/A/49/7/10 | Letter to the Duke of Manchester from F. Otway, Riverhill [Kent] |
| KMAN1/A/47/77 | Letter to the Duke of Manchester from F. Otway, Riverhill [Kent] |
| KMAN1/A/49/7/12 | Letter to the Duke of Manchester from F. Otway, Kensington [London] |
| KMAN1/A/49/7/13 | Letter to the Duke of Manchester from F. Otway, Kensington [London] |
| KMAN1/A/49/7/14 | Letter to the Duke of Manchester from F. Otway, Milan and Verona [Italy] |
| KMAN1/A/49/7/15 | Letter to the Duke of Manchester from F. Otway, Berkeley Square [London] |