Well, sad to say, I haven't found anything else.
KRIS
Kris, did you look for a possibility in the 1841 for the Amelia born ca 1824 hiding under some similar(?) name?
There's one oddity in the 1841 on FreeCEN - Amelia COTTENMOTH (name doubtful), age 15, a Pupil, birthplace unknown. This is HO 107/154/1/5/2. The 'next household' is a continuation of this page and changes halfway down to Page 5/3 - and every one of the people in this 'household' is a pauper ... I can't find the name COTTENMOTH anywhere else - IGI, Google, Ancestry. But this is in Launceston St Mary - a long way from Kenwyn ...
THE FAMILY FROM HELSTON
As I said above, I found a Mary bap 1791 as CARNARTHON.
I can't find a Benjamin to fit (waterman in 1841, coal porter in 1851). Though his birthdate (from 1851 census age) of ca 1804 fits nicely into a baptismal gap at that time - Mary 1791, Elizabeth 1793, Margery 1796, Charity 1798, Charles 1800, room for Benjamin!, Christian 1807, Ann 1809.
Incidentally, I can't find baptisms for Benjamin's children Mary and Peter (14 and 10 resp in the 1841) but the others (John 9, Richard 7, and Elizabeth 5) are in the IGI - John was bap 5 Oct 1834 as CARNAITON; Richard bap same day and surname as John; Eliza Ann bap 11 Apr 1841 as CARNARTON.
Sort of interesting that, in 1851, Peter C CARNARTON, 20, b Helston Cornwall, is a student at Terrace House Training Establishment for Schoolmasters in Battersea, London.
TRURO UNION
According to Genuki, both Truro St Mary's parish and Kenwyn parish were part of the Truro Union for Poor Law administration and parish relief. But why Truro Union would be mentioned on the marriage cert I don't know.
EMIDY
And I certainly love Joseph EMIDY!
CORNWALL QUARTER SESSIONS
Those Cornwall Quarter Session records are amazing. I've not come across them before (I know nothing about research in Cornwall) so I was most impressed.
There are also hits for CANARTHEN, CANNARTHEN, and CARNATHEN (the latter mainly the place) but they are not relevant.
AMELIA bap 1824
Valda, all your incredible work certainly has pinned down Amelia CARNARTON baptized (as COUNACKAN) in 1824, daughter of Charles and Mary.
Assuming that the baptism was not long after the birth and given the names of her parents, this Amelia of course fits with Amelia CARNARTON aged 3 in the 1828 (appeal against the) order against Mary, wife of Charles CARNARTON and their children Elizabeth 4, Amelia 3, Charles 1 3/4, and unbaptized son.
Incidentally, there is in the IGI the baptism of an Elizabeth DUFF, mother Mary DUFF, no father named, bap 13 Oct 1822, Kenwyn. Spot on for the pre-nuptial female child born Aug 1822 according to the 1822 order; but too early for Elizabeth 4 in 1828 (4 an error?).
That the order was against Constantine explains, of course, those 3 baptisms in Constantine in 1833 of children (William, Mary and Thomas) of Charles CARNARTON and Mary. William (13 in 1841) presumably the 'unbaptized son' of the 1828 order.
1842 DEATH CERT
This seems to be important - though a costly piece of information.
If this Amelia is ca 25, it pretty much drives a coach and horses through the hypothesis that Amelia CARNARTON, 24 in 1841, is Amelia who married George SLACK.
(And we could perhaps assume that the younger Amelia had died pre-1837)
On the other hand, if this Amelia is ca 17/18, we still have the twin problems of (a) might the 24 in the 1841 census have been an error and, if not, (b) where was this younger Amelia in the 1841.
(Assuming that Amelia COTTENMOTH is not a goer!!)
Intractable?
MARGERY
I like the idea of 86 yo Margery of 1851 and subsequent death being 70yo Mary of 1841. But how to prove?
VARIANT SPELLINGS
Just for interest, the IGI combines the following spellings (e&oe - and there may well be others):
*CARNARTON and CARNARTEN
*CANARTHEN, CANARTHAN, CANNARTHEN, CANNARTHIN, CANARTON, CANARTAN, CANERTHEN, CANARTHON and CANHERTIN (the last from Durham - probably not 'our' name)
*CARNARTHEN, CARNARTHAN, CORNARTHEN, CARNARTEON, CARNATHON, CARNITHEN, KARNATHAN and two which surely don't belong (CARNETON, Hereford and CARNITON, Worcester)
And not combined are:
*CARNAITON
*CARNARTHON
Cheers,
JAP