N.Ireland...railway staff

[mentorscotus]

My great grandfather Luke Daly was a railway porter at the time of his marriage in August 1869.He lived in Armagh,N.Ireland.
Is it possible to access Railway Company Records to find out more.
Who ran N.IRELANDS railways in 1869?
Where would I find these records?
Thank you contributors.|help|

[mentorscotus]

A kind poster has told me that my great grandfather Luke Daly was still working in Armagh at the time of the Armagh Rail Disaster.I am still looking for where records of N.Irelands railway service was kept.Where could I find this...and also read reports of the disaster?
Thank you.