Henry Charles Moorhouse HAWKEY

Request for information.Henry Charles Moorhouse HAWKEY, commissioned into the Royal Marines Nov. 1840.Is known to have fought a duel with pistols at Stokes Bay, Gosport, Hampshire, England, fatally wounding James SETON, late 11th Hussars.Hawkey fled to France and returned to the Royal Marines a year later.Was duly promoted Captain but underwent a General Court Martial at Woolwich 11th May 1852 for striking a fellow officer.
Died in London 5th Nov. 1859.
Any known relatives have further information of this man please?
Richard Pennell, Tavistock, Devon.