Hi,
From a local newspaper, The Londonderry Sentinal Marriage announcements, dated 29 Aug 1839. " 21 August 1839 by the Rev Samuel Butler, Mr John Fleming of Drumavally to Miss Sarah Ross , sixth daughter of Mr. William Ross of Ballymulholland".
The areas mentioned are in the district of Magilligan, about 17 miles north of Dungiven and the Rev. Butler was minister of Magilligan Presbyterian Church at that time.
Regards