Is this a possibility?
Alexander Calderwood
Male
14 Nov 1800
Baptism
23 Nov 1800
Stewarton, Ayr, Scotland
James Calderwood
Mary Sim
James Calderwood
Marriage Date:
1 Dec 1787
Marriage Place:
Stewarton,Ayr,Scotland
Mary Sim Ancestry.com. Scotland, Select Births and Baptisms, 1564-1950 [database on-line]. Provo, UT, USA: Ancestry.com Operations, IncAncestry.com.
Scotland, Select Marriages, 1561-1910 [database on-line]. Provo, UT, USA: Ancestry.com Operations, Inc., 2014. ., 2014.
Really though these are just indexes, for the marriage you might get more information if you could find it on http://www.scotlandspeople.gov.uk/
(unfortunately they charge)