Hi JoeM, my GGG grandfather was William Smart who married Ann Grant on 24/11/1851. Someone gave me information on Williams family which I have not yet checked so it may or may not be correct, but I will pass it on to you in case it helps your research. If you find out anything else please let me know!

I have been given Williams parents as John Smart and Barbara Lyon Hood. John was born 14/7/1875 at Collessie and Barbara 5/1/1801 at Strathmiglo. They were married 13/1/1823 at Collessie. There is no record of John's death (? pre 1855), Barbara died in 1873 in Brechin. I have John's parents as John Smart and Helen Simson, married in January 1774 in Fife. They had 3 children; John (above), Barbara b1792 Abdie, Fife and Robert b 1794 Abdie.
Barbara's parents were George Hood b 1770 @Strathmiglo and Catherine Christie b 1775 @Strathmiglo, married 12/1/1795 @ Strathmiglo. They had 2 children; Barbara (above) and Catherine b 23/10/1803 @ Strathmiglo.
As I say take this with a pinch of salt until you can verify its accuracy. Good luck!