good source Raymond, i triedthe following tack
Using the list below look up the civil parish in
http://www.irishgenealogyhub.com/derry-genealogy.php#.Wz0ohS2ZNEIand you should get more information eg townland if missing
Ballykelly is in Tamlaght Finlagan
My purpose was to isolate the Leech and McIvor to the same civil parish for a likely place the couple met, but that hasn’t worked. if you went to surrounding civil parishes some clue might be available, but I don’t have the time to do the geography . if you end up brickwalled then consider it as a wild possibility
McIver, Hu. McIver, Hu. Desertlyn Derry
McIver, Hu. McIver, Hu. Desertlyn Derry
McIver, Danl. McIver, Danl. Kilcronaghan
McIver, James McIver, James Kilcronaghan McIvor, Daniel McIvor, Daniel Kilcronaghan McIvor, James McIvor, James Kilcronaghan McIver, Townland: Bay Year: 1828 McIver, Townland: Bay Year: 1829 Maghera Derry
Leech, Cathrine Leech, Cathrine Tamlaght Finlagan Derry
Leech, James Leech, James Tamlaght Finlagan
Leech, John Leech, John Tamlaght Finlagan Derry
Leech, William Leech, William Tamlaght Finlagan Derry
McIver, James McIver, James Tamlaght O Crilly
McIver, Patk., Sr. McIver, Patk., Sr. Tamlaght O Crilly
McIver, Peter McIver, Peter Tamlaght O Crilly
McIver, Peter, Sr. McIver, Peter, Sr. Tamlaght O Crilly Derry
McIver, Wm. McIver, Wm. Tamlaght O Crilly Derry
McIver, Bryan McIver, Bryan Lissan Derry & Lissan
McIver, Dennis McIver, Dennis Lissan Derry & Lissan
McIver, Michl. McIver, Michl. Lissan Derry & Lissan
Leech, James Leech, James Tamlaght Derry & Tyrone
Leech, William Leech, William Tamlaght Derry & Tyrone
McIver, Hugh McIver, Hugh Arboe Derry and Tyrone
Leech, Widow Townland: Drumbrock Year: 1826 Year: 1827 find parish
Leech, Widow Townland: Nedd Year: 1826 1827 find parish
Leech, Widow Townland: Oghill Year: 1826 1827 find parish
perhaps I should have done it for griffiths valuation in 1858
Leech John Glack Tamlaght Finlagan
Leech James Glack Tamlaght Finlagan
Leech Mary Glack Tamlaght Finlagan
Leech Patrick Glack Tamlaght Finlagan
Leech Susan Glack Tamlaght Finlagan
Leech James Dunbrock Tamlaght Finlagan see
http://griffiths.askaboutireland.ie/ he had a farm of 43 acres but not good soil and an above average house
Leech Susan Glack Tamlaght Finlagan
Leech James Glack Tamlaght Finlagan
Leech John Glack Tamlaght Finlagan
Leech Mary Glack Tamlaght Finlagan
Leech Patrick Glack Tamlaght Finlagan
Leech James Dunbrock Tamlaght Finlagan