Leesa,
SP has sent me the correct page re marriage of your ancestors.
The entry for August 13, 1852 states:
"George Annand (lately overseer to Lord Murry) and
Jessie Armstrong, both in this Parish.
One Day"
A little further research reveals that this was Sir John Archibald Murray, Lord Murray (1779-1859), who was appointed to be a judge, a permanent of the Lords Ordinary in the Court of Session, in 1839. If you Google him you will find a picture in the National Portrait Gallery and entries in Wikipedia and other places. He lived in Edinburgh, but had a country residence at Strachur on Loch Fyne, which might have been overseen by your ancestor.
Further reference to the latter possibility may be found at this link, which is a discussion related to a posting, apparently by one of your relatives:
https://groups.google.com/forum/#!topic/soc.genealogy.britain/7KzWgXd-K4EThe Campbell Clan at one time had an estate, which is also mentioned above, at a place only 8 miles from Strachur, called Ardkinglas - ie. Sir James Campbell, 2nd Baronet of Ardkinglass, (c.1666 – 5 July 1752) who was a British Member of Parliament and the son of Sir Colin Campbell, 1st Baronet, of Ardkinglass. This line seems to have died out, but the estate was later acquired by the Callander family, one of whom married a brother of the 9th Duke of Argyll. George Annand is mentioned in the link above as having been at that estate. Perhaps some census data will further clarify things about his ancestry.
Hope this helps
John