Well they are not at Tydavnet... I'm looking for a particular Jackson record which eludes me so far but will be back in Monaghan for 3 days next week.... 
17th June 1891 David Clarke son, David Clarke , Aghnasedagh, Monaghan Parish,   married  Charlotte Jackson dau  , Joseph Jackson, Tullaghan  witnesses Thomas Ross + David W.Jackson
  
16th Feb 1843  Thomas Wright , Drumloo, Clones Parish , married Elizabeth Jackson , Allagesh    witnesses Robert  Farrell 
13th Jan 1871 David son, John + Martha Jackson , Allagesh  31st Mar 1874 Robert William son, John + Martha Jackson , Allagesh     5th Mar 1876  Martha Jane daug, John + Martha Jackson , Allagesh    22ndJan 1878 Sarah daug, John + Martha Jackson [nee Farrell]  , Allagesh   26thMay 1882 Charlotte daug, John + Martha Jackson , Allagesh     13th June1884 Vina daug, John + Martha Jackson , Allagesh   1st Jan 1887  Lizzie Isabella daug, John + Martha Jackson , Allagesh         30th May 1889 John Edmund son, John + Martha Jackson , Allagesh   
26th Aug 1829  William Irwin  , Foremass   married  Mary Jackson ,  Killygoney , Killygavna  witnesses John Jones + William McCoyª      14th Dec1838 Alan  son, William + Mary Irwin, Foremass     15th Oct 1842  Margaret Anne daug, William + Mary Irwin [nee Jackson] , Drumbenagh
17th April 1850  Alexander Jackson son, Henry Jackson , Tandrageebane, Monaghan Parish,  married  Elizabeth Alice Blackburn daug, John Blackburn , Creesil  witnesses John Blackburn + David Jackson 
26th Jan 1830 John Jackson , Allagesh   married  Jane Baird , Drumslavo   16th Oct 1839   John son, John + Jane Jackson [nee Baird] , Allagesh   14th Aug 1836 Humphrey son, John + Jane Jackson [ nee Baird] , Allageshª      16thOct1839   John son, John + Jane Jackson, Allageshª      26th July 1844 David son, John + Jane Jackson, Allagesh    2nd Nov 1848 Anne Jane daug, John + Anne Jane Jackson [nee Baird] , Allagesh
4th April 1844  Elizabeth daug, Richard + Maria Jackson , Allagesh  25thFeb 1858 William son, Richard + Maria Jackson , Ballinode 
6th  April 1943   Edward Jackson [age 21]   son , Edward Jackson, Corlat, Monaghan,   married  Edith Mary Wright daug, William Wright ,  Tedavnet  witnesses Dorothy Margaret Wright + Robert Henry Jackson    
3rd  April  1823 Hugh son, Henry + Mary Jackson , Mullahara  ª    11th Mar 1826 Richard son, Henry + Mary Jackson , Mullahara ª
16th May 1843 Elizabeth daug, Christopher + Mary Jackson , Allagesh ª
14thMay 1833  Mary daug, McManus + Mary Jackson , Rafeenan  
23rd Nov 1898  John Jackson son, Henry Jackson , Mullahara,   married  Fanny Wright daug, George Wright , Rafeenan   witnesses John  Leary + Maggie Leary 
30th Nov 1827 Thomas  Hazlett, Corragh, Donagh Parish,   married  Elizabeth Jackson , Telaydan  witnesses  Robert Jackson + Robert Heaslett 
10th Jan1828 David  Harton, Killygoney married  Mary Jane Jackson , Sheetrim  witnesses William Heaslett  +James Ryner   
29th Feb1840 Mary Anne daug, Christopher + Mary Jackson , Allagesh   16th May 1843 Elizabeth daug, Christopher + Mary Jackson , Allagesh ª
22nd Mar 1850 Andrew son, Thomas  + Elizabeth Jackson 
16th Jan 1883  John Wilkinson son, Thomas Wilkinson , Rafeenan, married Mary Anne Jackson daug, Robert Jackson , Drumcoo Jackson  witnesses Charles Wilkinson + Sarah B. McElnay        25th Oct 1883 Richard son, John + Mary Anne Wilkinson [nee Jackson] , Corragh, Donagh Parish
26th Aug 1829  William Irwin  , Foremass   married  Mary Jackson ,  Killygoney , Killygavna  witnesses John Jones + William McCoyª    14th Dec 1838 Alan  son, William + Mary Irwin [nee Jackson] , Foremass    15th Oct 1842  Margaret Anne daug, William + Mary Irwin [nee Jackson] , Drumbenaghª