The London Gazette 22319. Whitehall, October 25, 1859.

The Queen has been pleased to give and grant unto Fiennes Wykeham-Martin (age 27), of Leeds Castle, in the county of Kent, a Captain in Her Majesty's Fourth Regiment of Light Dragoons, second son of Charles Wykeham-Martin (age 58), of Leeds Castle, aforesaid, Esquire, by the Honourable Jemima Isabella, his wife, commonly called Lady Jemima Isabella Wykeham-Martin, daughter of James, fifth and last Earl Cornwallis, both deceased, Her Royal licence and authority that he may, in compliance with a proviso contained in the last will and testament of Caroline Frances Cornwallis, of Nizells Heath, in the parish of Tonbridge, in the county of Kent, and afterwards of Lidwells, in the parish of Goudhurst, in the same county, spinster, take the surname of Cornwallis in lieu of his present surnames of Wykeham Martin, and also bear the arms of Cornwallis, and that such surname and arms may in like manner be taken and borne by his issue; such arms being first duly exemplified according to the laws of arms, and recorded in the Heralds' Office, other wise the said Royal concession and declaration to be void and of none effect.

And also to command that the said Royal con cession and declaration be recorded in Her Majesty's College of Arms.

On 05 May 1863 Fiennes Wykeham-Martin Cornwallis (age 31) retired from the Army with the rank of Major.