Children that I can find of Sarah McK and John Turpie who married in 1844, randomly from Family Search
Jane Turpie born 1846 apx died 25/5/1863
Christina Turpie born 1847apx marr Archibald Nicholson 23/2/1866 died 8/9/1871
Jessie Turpie born 1851 apx marr John Gloag 30/9/1870
Sarah Turpie born est 1857 died 22/5/1859 or is she this one Sarah Turpie born 4/11/1856 so born 1856 died 1859
Sarah McKenzie Turpie born 6/12/1862 died

7/12/1877
Jane possibly being the first born daughter may have been named for the mother's mother.