I only have records for two sets of Morrisons in the Skreen records and neither match your family.
The main family is that of William B Morrison whose family is listed at Farranyharpy (or variants) in 1901 & 1911. In 1901 his mother in law, Margaret Coulter aged 83 was with the family.
The other is a William Morrison farmer of Killeenduff, son of William, who married on 22 Feb 1872, aged 23, to a Mary Jane Scott aged 26, dau of Robert Scott.
My gt grandfather's sister Jane Livingston married (1879) Thomas Black & they lived in Lugawarry, Ballysadare. Skreen was not their local parish so I would not expect your Morrisons to be in the Skreen records either. I do not have church records for Ballysadare.
Sorry I cannot help, except to suggest you check the Griffiths valuations for Hugh. He could have been a farmer. Two of my gt-grandfather's brothers, as well as my gt-grandfather were also RIC and their father was a farmer.
Linda (NZ)