Whoops! I knew I forgot something!

Thomas Dean ( Deane) religion, Roman Catholic.
As for his birth place: the 1911 limerick census says born in Belfast City. The 1901 census says Co Antrim.
The same census also gives different ages. however, the marriage cert and the 1911 census both suggest he was born in 1861 or 1862
Just had another thought when typing this: Thomas Dean was an Engine Fitter on the railway, as was his father William Dean ( Railway Engineer) Are there any searchable Northern Ireland railway employee records available ( preferably online) I would not know the railway company in Belfast or Antrim, unfortunately.
Many thanks.