Dear Lindsay and Veronica,
HURRAH!! I love when this happens! Here is the marriage of Christopher and Catherine
http://churchrecords.irishgenealogy.ie/churchrecords/details/ce12140028534
This appears to be Christopher's baptism
http://churchrecords.irishgenealogy.ie/churchrecords/details/4bd8b90000861
Harold and Talbot are not the most common names in Kerry and the fact that they worshipped in the Church of Ireland means that you may be able to trace them even further back. If you use this website of the links above you may find the siblings of Christopher and Catherine since you now have their fathers' names.
It appears also that the Talbots were related to the Blennerhassetts and since they were such a 'big' landowning family, you may find more about the Talbots in their family tree!
Here is a land record for Boyle Talbot (possibly Catherine's father) in 1850
http://www.askaboutireland.ie/griffith-valuation/index.xml?action=doNameSearch&familyname=Talbot&firstname=&offset=0&countyname=KERRY&parishname=&parishname&unionname=&baronyname=&totalrows=44&PlaceID=0&wildcard=
Here is a land record for Richard Harrold (possibly Christopher's father) c. 1850
http://www.askaboutireland.ie/griffith-valuation/index.xml?action=doNameSearch&PlaceID=610201&county=Kerry&barony=Trughanacmy&parish=Ballymacelligott&townland=Maglass,%20west
Margaret Neil will be harder to find. I found one Margaret born 1812 here but there is no guarrantee she is the right one. The mother's name Cluvane is most often written Clifford in more recent times.
http://churchrecords.irishgenealogy.ie/churchrecords/details/889fbc0298803
have you any other information about Margaret?
It's getting late now but let me know how you get on with these links and we can figure out where is your best bet for visits when you come to Ireland next time.
Martine