Some more thoughts, information and scenarios for you.
Firstly - we have a problem in that there are at least two families of Joseph and Mary Martins active in Ludgvan and Towednack at the same time.
One of these, at least, is baptising children at Ludgvan a couple of years prior to the marriage of our Joseph to Mary Ninnes.
Next item is that we have two Joseph Martins baptised in 1815.
1. at Ludgvan s/o Joseph as has already been mentioned in an early post.
2. Joseph MARTINS bp. 31st October 1815 at Towednack s/o James and Charity.
Now this second bloke could be interesting.
It is 'just' possible that there might be two families of James and Charity but I have so far found no evidence to support it.
If there is only the one then James and Charity had a rather hectic life - 14 children recorded over 27 years.
James MARTINS m. Charity CARBUS 22nd May 1795 at Towednack
Now you might baulk at the possibility of that many children over such a long period but I believe I have now found a baptism for Charity.
She was baptised 19th February 1775 at Ludgvan d/o Christopher CARBESS and Ann (nee CATHARINE).
Christopher and Ann were married at Ludgvan in 1768 and had two children baptised at Towednack - William (1781) and Mary (1786).
Charity would have been only 20 when married and 47 at the time her last child was baptised.
My one main problem is that there are baptisms for two children named William (1802 and 1818) and this problem may present itself in the Census information I am about to display.
Remember also that although Joseph was baptised at Towednack it does not necessarily mean he was born there.
1841 Census
Pool Hedgy, Ludgvan
Joseph Martins, 25, tin miner
Mary do., 20
Mary do., 2
CHARITY Martins, 65, ind.
Arthur do., 23, tin miner
William Martins, 35, tin miner
Frances do., 35
William do., 5
Ann do., 3
John do., 2
Christopher do., 3 mths
These three families are enumerated immediately after each other.
But I have two concerns here.
The first is the Arthur Martins enumerated with Charity but he might be explained.
There is an Arthur Martins bp. 3rd July 1818 at Towednack son of John (carpenter) and Catherine Martins.
Hmmm. - that is the same day that James and Charity baptised what appears to be their second son William at Towednack.
John and Catherine had 10 children baptised at Towednack from 1816 to 1838 including Catherine Nichols Martins who married William TREWHELLA at Towednack in 1858.
It may be possible that John was a brother to James.
IGI shows the following:-
John MARTIN bp. 30th September 1792 at Towednack
m. 9th December 1815 at Towednack
Catherine PENBERTHY
That baptism makes John the son of David and Margery Martins.
The only Arthur baptised around the right time (according to IGI) is the one above at Towednack.
My second problem is the third household at Pool Hedgy.
William would be born somewhere around 1800-1805 in which case he would most likely be the son of James and Charity baptised in 1802 - if he is actually connected directly.
So the William baptised in 1818 becomes the real problem UNLESS there has been an error in the Transcription.
1851 Census
Higher Chellew, Ludgvan
Joseph Martins, head, mar, 34, tin miner, Ludgvan
Mary do., wife, mar, 34, Towednack
MARY JANE do., daur, 12, Ludgvan
Elizabeth do., daur, 8, Ludgvan
John do., son, 6, Ludgvan
CHARITY do., daur, 4, Ludgvan
Cathrine Ann do., daur, 1, Ludgvan
Here are the probable baptisms for the children (bearing in mind there is more than one family of Joseph and Mary):-
Elizabeth bp. 9 October 1842 Ludgvan
John bp. 26 January 1845 Ludgvan
Charity bp. 24 January 1847 Ludgvan
Catherine Ann bp. 21 October 1850 Ludgvan
There is no Mary Jane baptised at Ludgvan.
But:-
Mary Jane MARTINS bp. 3rd March 1839 at Towednack d/o Joseph (miner) and Mary
It is unfortunate that William Martins (1841 Census with Frances) had died prior to the 1851 Census.
His wife Frances, however, was born in Gulval which might help us.
There are plenty of clues here to suggest that your Joseph was born at Ludgvan but baptised at Towednack and was son of James and Charity Martins.
Arthur Martins appears at Towednack in 1851 also with a daughter named Charity and his stated birthplace is Ludgvan.
I would suggest that my comment above might be worth thinking about - that a possible transcription error has occurred when recording the baptisms of William and Arthur in 1818 at Towednack.
1861 Census
Joseph is back at Pool Hedgy, Ludgvan, and is now a widower with four additional children:-
Joseph (8)
Thomas (6)
James (4)
Lisea? (2)
All were born at Ludgvan.
That had best do for now as it is way past my bed time.
But please detail the QUICK MARTIN information for me and I will see what I can find out.
Ian