Hi Mike , I can't find anything definate yet.
I think that's why I gave this line a rest

So far- Margaret Calder m. William Walker in 1852. in Cadder, both of Parish.
Her death cert states her parents are George Calder and Mary McPherson. (cannot find this marriage or any births to this couple, so am beginning to suspect a mistake somewhere on the death cert. unless they were non-conformists)
Margaret Calder/Walkers death cert in 1887 and a Walker childs birth cert in 1855 states she was previously married to John Horn*, her maiden name Calder.
Cannot find the Horn marriage.
The 1841 census for George Calder has his wife as Ellen, though a daughter Margaret appears to be the right age for mine. Margaret is not there in 1851, and can't find her yet under Horn.
Have tried both Cadder Lanarkshire, and Kirkintilloch, Dunbartonshire for censuses , and the whole of Scotland for marriages.
A George Calder has children to an Elizabeth( Ellen?) Burns, but the first one I see is if I remember rightly abt. 1830, so it could be possible George was married before.
Anyone any suggestions?