Murtagh in Tattynure

I am trying to find out more information about my g-g grandfather Patrick Murtagh (b c1839) and his wife Sarah Ann Clarke (b c1849). He was a schoolteacher at the National School in Tattynure in 1860's. He married Sarah Ann Clarke in 1868 before moving to England in 1869/70. Their marriage certificate lists their fathers as Owen Murtagh and Robert Clarke, both farmers. Sarah is recorded as being from Stewartstown.

Would also like to find out more about the school Patrick taught in and the area of Tattynure itself.

Clare