Searching for Samuel BELL

[sosh]

I am hoping you may be able to help me.
 
I am trying to find more information regarding the parents of Elizabeth BELL.

Elizabeth BELL was baptised 11 July 1806.
Parents are listed as Samuel BELL (Innkeeper in 1806 in Dumfries) & Jean/Jane CHARTERIS.

Elizabeths siblings are; John Charteris Bell (b1808), Alexander Scot Bell ((twin (b1820)), James Bell ((twin (b1820)). There is a large gap between John, elizabeth and the twins but it is atrue record of birth.

The mother, Jane CHARTERIS is also a bit of a mystery as i cant find anything on her either.

Any help will be greatly appreciated. I have the birth records for the children but nothing on the parents including their marriage which doesnt show up on Scotlands GRO either.

Thanks,
Sue