Hello Richard,
You can find William John Morrison on the 1911 census, age 68, living at house number 28 Malone Park, Windsor Ward, Co. Antrim.
Some extra pieces. Griffiths Valuation (1864 for Co.Armagh) shows James Morrison renting a house, barns etc and 26 acres of land in Derryhale.
The 1911 census shows 71 year old Thomas Morrison living in Derryhale as a retired farmer.
Georgina Kirkpatrick Morrison married Francis Wilson Carson in 1898 and they can be found in the 1911 census, living in Belfast with their two children.
Regards