Hi Lesley, I guess I will have to resort to LDS microfilm.
There seems to be plenty about James Wemyss's Wifes Family:
I can find Elisabeth Crombie's parents (Alexander Crombie married to Margaret Murray and six children, Margaret b 1791, Thomas b 1793, George b 1795, James b 1798, Elisabeth b 1800, Grizel b 1805.
Margaret Murray married a John Scott (confirmed by her death cert), so I think she is living next door to her sister Elizabeth in the 1841 Census.
Later on a 'James Baxter' witnessed the Death of James Wemyss and Elisabeth Crombie's son James Wemyss b 1842. James Baxter was the husband of Margaret Crombie (her father was George Crombie b 1795).
More:
JAMES WEMYSS Parents:James Wemyss, Charlotte Caroline Wemyss.
Gender: Male Christening: 15 DEC 1807 Wemyss, Fife, Scotland.
(This man died in 1865 and was a Major, his father James Wemyss was born in 1778.)
So he could not be the man that married Elisabeth Crombie.
Which leaves the mysterious:
JAMES WEMYSS Parents: William Wemyss, Jean Blythe.
Gender: Male Christening: 27 NOV 1793 Wemyss, Fife, Scotland
I guess I just have to keep digging!
Melissa