Hi!
What I see from your postings, Gadget:
1851 Census at Cathcart, Renfrewshire.
560 ED2 Page: 26Peter Ferns 40 Block Printer Journeyman born Glasgow.
Agnes 39 Dyer Journeyman born Ayrshire
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1861 Census
571 ED 2 Page: 30Peter Ferns 62 (Gee, that's quite a difference from previous Census!) Block Printer, Printfield. born Glasgow.
Agnes 55 born Glasgow.
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1881 Census
567/1 ED 4 Page: 19Peter Ferns, father, widower, aged 82, formerly Block Printer born Glasgow.
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It just goes to show how crucial information can change, eh? If the 1851 Census details about Agnes Ferns M.S. Jackson is correct about her place of birth, i.e. Ayrshire, then I, personally, would feel a wee bit happier.
When I look at the
01/01/1872 Ferns, Agnes (Statutory Deaths 571/00 0054),I see the weird spelling of the Surname, can't really make out the writing underneath her name, although I think it says Married to Peter Fearns .... (and I've only recently had new reading glasses!

Her age at death is given as 66 which, if my mental arithmetic is still Ok, makes
her birthdate about 1806. Her Mum and Dad are shown as James Jackson and Margaret Jackson, M.S. Millar. That is in perfect agreement with what I have and allows me to say that Agnes Jackson was christened 15th November, 1807 at St Quivox and Newton in Ayrshire. Her brother, Hugh Jackson was christened 19th July, 1801 at Sorn in Ayrshire and his sister, Mary Jackson, was christened 24th March, 1803 at Sorn in Ayrshire. These are all EXTRACTED records.
So, there I think we have quite a comfortable bit of data to work from. Again, very many thanks, and I must say how much I'm enjoying working along with you. great stuff!
Tom.