Wendl,
Another source gives the same marriage, Samuel Livingstone/Mary Ann Nutt, as 29 Aug 1861 in Largy Presbyterian Church, Parish of Carrick, Limavady. This church is about 3 miles south of Limavady on the road to Dungiven on the west bank of the River Roe. IGI gives one child, James, born 10 Jun 1867 and it also uses the spelling Levingstone.
Regards