Ah superb! Thank you you two! I think that definitly points to John Nicol that died 1849 as being my John Nicol doesn't it?

Thanks for that 1851 census Ev, I'm aware of them having a dau named MARY but as of yet not a JANE. So possibly the other JOHN NICOL from the records could possibly be another child I haven't found yet?
So my question is, how come I can't find a death cert for John pre 1855? Possibly a misspelling of his surname do you think? I've tried ones such a Nickle and now also NICEL.
If he had a birth of around 1787 I can see a few, how could I possibly narrow this done? Is it even possible? As it was already stated, pre 1855 records even if I could find it don't name parents

Molly