The earliest record that I have found regarding a presence at Cartronmore seems to be in 1842, with the birth of John Barber. His father was probably John Barber who appeared in the 1858 Griffiths Valuation at Cartronmore. John (b. 1842) married Margaret Jane Craig, December 15, 1870 in Ballisodare, Collooney Parish, Co. Sligo. The question would be, where did the earlier John Barber come from? Most likely Gortarowey or Cooladrummon where there were earlier generations of Barbers with the given name John.
1842 - John Barber born
1858 - John Barber, occupant in Griffiths Valuation, Sir Robert Gore Booth was Lessor, Land and house, 13 acres.
1901 - Census shown above.
The 1911 - Census shown below.