Peter Henry Gillespie and Mary Ann Holland Hullen Northern Ireland Armagh

If anyone can help out with info pertaining to Peter Henry Gillespie married to Mary Ann Holland or Hullen? They were born approx 1883 and lived, I think in Armagh or northern Ireland? Sons, William Thomas and Walter Gillespie both born 1960 and 1963 respectively? There maybe be other siblings? I'm really at a roadblock with this one...this Gillespie tree is really NOT an easy one. Any help would be greatly respected and appreciated.