For Sar(ah) Morgan (a variant) B 1856 +/- 4 yrs, somewhere in Ireland, with the father's forename unknown, I found 20 rcds. None were in Co. Laois. The lack of a rcd in Laois infers: 1) your info is wrong. 2) the rcd didn't survive. or 3) the rcd hasn't been transcribed.
For John Sweeney B 1853 ditto, Co. Sligo, I found 8 rcds: 3-1850, 1851, 2-1852, 1853, and 1856. Father's forename for the 1853 rcd was also John.