Sarah Affleck who married John Gilston. They had a daughter Elizabeth Aug 3, 1819 Balmaclellan, Kirkcudbright, Scotland and a daughter Henrietta Copland Murray Gilston May 31, 1832 Parton, Kirkcudbright, Scotland. ( Found on LDS.org search)
It would appear that George and Sarah were related to Henrietta Affleck who married Alexander Murray in 1808. Henrietta died in 1825.
Copland may be from David Copland who married Margaret "Fleck" in 1778. Would have been Henrietta's Uncle.
Also there was a James Affleck that married Agnes Copland before 1824 ( Looks for an Agnes Bryce as mother). Robert Affleck married Jean ( Probable father John Copland) in 1829. James Affleck married Margaret Copland in 1852.
I can not connect any of these names to my tree but funny how the names keep coming around. lol Jody