Clark & Aitchison Marriage & Death look up

[vanessac]

I am looking for any information on the following two critters who have seemed to elude being recorded on any formal registers.  I am after birth, marriage or death information.

What I have is as follows

Helen Aitchison born abt 1791, polwarth, Berwick, Sct
married abt 1812 to
died 31 Feb 1843, buried Preston Cemetery

George Clark, born abt 1787, polwarth, Berwick, Sct
died 22 April 1855, buried Preston Cemetery

I have not been able to find a formal record of their births, marriage or deaths and would like to find something that would give me that next link back a generation