This collection documents the Duke's military activities at Gibraltar, Canada, and the West Indies. The majority of the correspondence is between Prince Edward and Colonel, later General, William Edmeston, however, there are a few letters to Edmeston from other military officers and administrators including I. Hale, G. Smyth, John Montrifor, G.H. Charlton, I.A. Vesey, and Lieutenant Colonel Scott. The letters were written from various locations: Gibraltar, Quebec, Halifax, St. Helen's, Hilsea, London, and Antrim and discuss the 50th Regiment of Foot and the Royal Fusiliers. The collection also contains two separate lists containing the names, age and height of soldiers transferred between the 50th Regiment of Foot and the Royal Fusiliers, one is dated 20 May 1791 and the other is undated; a three-page account, dated 11 April 1793, detailing a plot planned by four soldiers from the Royal Fusiliers to murder Prince Edward; and a copy of a four-page narrative, written on 20 February 1798, giving details of the battle fought by the Grenadiers of the 40th Regiment when the islands of Martinique, Grenada, St. Vincent, St. Lucia, and Tobago were taken during the Seven Years War.