Spoke to volunteers in Camden Fort Meagher. Advised no military graveyards in Cork Harbour area but CWG headstones in a number of local graveyards. Usually soldier would be buried in local graveyard by his unit as it would cost family considerable amount to have remains returned to homeplace for burial. Family may have attended burial (depends on family circumstances and where they live etc) Nearest graveyard is Templebreedy so I drove over the road to there and had a look. Graveyard is old with a lot of old headstones with undecipherable inscriptions. Found a grave for Srgt Major Morgan R.E. died 29 September 1908. Is this your relative? The inscription is roughly as follows: In memory of Srgt Major Morgan R.E. (next couple of words unreadable) Crosshaven. 29th September 1908. Rest unreadable.
Have taken some photos just to show there is a headstone and it's location in relation to ruins of church but inscription will be unreadable.
Hope this is of benefit to you.