Scroppers your counting makes perfect sense now that know it was sets not individuals!!
Anyway not got all 16 sets (got 15) from the 3*g generation due to illegitimacy. Also in one of the sets in this generation the husband may not be the father of my gg grandfather
Paternal side:
Robert Douglas and Jane Telford (m Carlisle 1824)
William Donaldson and Rebecca Jardine (m 1845 St Mungo Dumfriesshire )
William Black and Isabella Wright (m 1847 Dalziel, Lanarkshire)
John Faulds and Isabella Lindsay (m 1847 Dalziel, Lanarkshire)
Andrew Townsley and Mary Docherty (m 1856 Antrim)
Terrence Cunningham and Mary Campbell (m 1854 Glasgow)
Thomas Davidson and Ann Killalely/Killala/Killale (m 1863 Auchlenck Ayrshire)
John Campbell and Susan McLuskie (not got marriage date before 1855 and RC so not in OPRs)
Maternal side:
James Gray and Catherine Pettigrew (married 1845 Cambusnethan, Lanarkshire)
Archibald Richardson and Elizabeth Pitcairn (married 1841 Old Monkland, Lanarkshire)
John Craig and Jean Campbell (married 1866 Glasgow)
John Campbell and Agnes Cowan (married 1883 New Monkland, Lanarkshire)
John Tripney and Georgina Corbett (married 1873 Falkirk)
James Thomson and Christina Thomson (married 1876 New Monkland) (no obvious family relationship found betwen these Thomsons!)
Margaret Muir and Francis Lauchlan (married 1870 New Monkland but was Francis the father of William?)
Gordon
Update: Got new info thanks to Rootschat!!!! John Campbell who married Susan McLuskie was actually John Campbell McIlhern(or similar sounding spellings). Knew he was from Armagh already but it seems that over the years he dropped the McIlhern surname over his years in Scotland and used his middle name Campbell as a surname. So now know the marriage was in 1854 and now got his daughter Rose(my great great grandmothers) birth entry which I couldn't find before. All thanks to MonicaLesl who discovered the other surname for me