Hi bev
Still checking on your behalf but have yet to find any definite birth or marriage records. I did check out Griffith Land Valuation which took place between 1848 and 1864 to see if I could pinpoint exact location of your McGee and Clarke families. However there are a few people with each of the names so I'm no closer to knowing which are yours!
For John Magee (didnt find McGee or McGhee)
There were persons of that name leasing land in the following areas:
Ballylifford, Ballinderry prish
Catherine Street, Newtownlimavady
Waterside, Killowen
Ardvarness, MacOsquin pairsh
Gulladuff, Maghera parish
Tamlaght
Mallymaclary and Duncrun, Tamlaght and McGilligan parish
Similarly James Clarkes were found leasing land in Maghera Parihs in the following townlands;
Ballymacilcurr
Craigmore
Drummuck
Falgortrevy
Gulladuff
Macknagh
Since we have a John Magee and a James Clarke both in Gulladuff townland, Maghera parish, these might be the ones.
Teri