Robert George McCahon was the third son of James McCahon. He was born about 1911. The family lived in Tamlaght-O’Crilly and then in of Crewe, Culnady, in the Upperlands area. Around February 1939, Robert George McCahon joined the Royal Navy. First Class Stoker Robert George McCahon served on the light cruiser H.M.S. Dunedin. On 24th November 1941 HMS Dunedin was attacked in the South Atlantic by a U-boat and was hit by two torpedoes and sunk. Stoker Robert George McCahon was one of those who died.
The Memorial is situated on Southsea Common overlooking the promenade, and is accessible at all times. A copy of the Memorial Register is kept at the Civic Offices in Guildhall Square and may be consulted there.