William F. Unsworth (1851–1912)
1868 – Mount St. Joseph Convent of Mercy, Strabane, Co. Tyrone
1884 – Gate House, Sion Mills, Co. Tyrone
Architect: W.F. Unsworth
Built to complement the large house built for the Herdman family, it is quite similar in design to one at Stokesay Castle.