This looks like him:

1861 England Census
Name: William Henry Harris
Age: 21
Estimated Birth Year: abt 1840
Relation: Son
Father's Name: John Harris
Mother's Name: Grace Harris
Gender: Male
Where born: Camborne, Cornwall, England
Civil Parish: Camborne
Ecclesiastical parish: Camborne St Martin
Town: Camborne
County/Island: Cornwall
Country: England
Registration District: Redruth
Sub-registration District: Camborne
ED, institution, or vessel: 4

John Harris 48
Grace Harris 49
William Henry Harris 21
Ann Harris 16
Grace Harris 14
Mary Harris 10

Marriage

Name: William Henry Harris
Registration district: Redruth
County: Cornwall
Year of registration: 1867
Quarter of registration: Oct-Nov-Dec
Spouse's name: Annie Pascoe
Volume no: 5C
Page no: 407

Note; the above marriage was the only one I could find for a William harris to any pascoe between 1860-80. How sure are you that he married a Nancy?

In the 1861 cencus, Nancy was 13 years old,by 1871 she was married and was down as Annie, as well as in the 1881 cencus.

this is the right marriage information, thankyou, but william henry(or hubert) harris was born at around 1848 so does not tie in withthe information you gave me.

This is possibly the 1861 Census for William


1861 England Census about William Harris
Name: William Harris
Age: 14
Estimated Birth Year: abt 1847
Relation: Son
Father's Name: Richard Harris
Gender: Male
Where born: Camborne, Cornwall, England

Household Members:
Name Age
Richard Harris 53 Copper Miner
Matthew Harris 27 Copper Miner
Richard Harris 21 Copper Miner
Thomas Harris 19 Copper Miner
William Harris 14 Blacksmith
James Harris 12 Scholar
Mary Harris 5 Scholar
Ann Harris 26 Servant Housekeeper

All residents born Camborne Cornwall


1851 England Census about William Harris
Name: William Harris
Age: 4
Estimated Birth Year: abt 1847
Relation: Son
Father's Name: Richard Harris
Mother's Name: Mary Harris
Gender: M (Male)
Where born: Camborne, Cornwall, England
Household Members:
Name Age
Richard Harris 44 Copper miner
Mary Harris 30 b Gwinear
Charles Harris 19 Carrier
Matthew Harris 17 Copper Miner
John Harris 15 Copper Miner
Elizabeth Harris 14
Richard Harris 10 Scholar
Thomas Harris 9 Scholar
William Harris 4 Scholar
James Harris 2 Scholar

all born Camborne with the exception of Mary born Gwinear

It appears that Mary may be his second wife as Charles is 19 and Mary only 30 which would make her too young to be his mother.

I did find a baptism for Charles on Cornwall OPC site

Day Month 11-Dec
Year 1831
Parish Or Reg District Camborne
Forename Charles
Surname HARRIS
Sex
Father Forename Richard
Mother Forename Alice
Residence Ramsgate
Father Rank Profession Miner
Notes
Transcriber Notes src:Tapley-Soper
Transcriber Sally Cann

These are the other children for Richard & Alice that match the 1851 Census

1831 Camborne Charles HARRIS Richard Alice
1833 Camborne Matthew HARRIS Richard Alice
1834 Camborne John HARRIS Richard Alice
1837 Camborne Elizabeth Alice HARRIS Richard Alice

and I didn't find any Baptisms for children of Richard & Mary nor a marriage for Richard to Alice or Richard to mary.


1841 England Census about Richard Harris
Name: Richard Harris
Age: 30
Estimated Birth Year: abt 1811
Gender: Male
Where born: Cornwall, England
Household Members:
Name Age
Richard Harris 30
Alice Harris 30
Charles Harris 10
Matthews Harris 8
John Harris 7
Elizabeth Harris 4
Richard Harris 1

I have taken note of the information you gave me, but my only concern is that none of the names have been passed down the family since. There is a Nicholas an Alfred, Samuel, Beatrice , Ethel and an Ada. Perhaps my family came from outside of Camborne? I do appreciate your help thankyou.

You say this is the right marriage so do you have the marriage cert ? If so what are their fathers names and occupations ? You should also find the ages for Annie and William Henry. If you do not have it I would suggest you get it before trying to go further back.


Marriage

Name: William Henry Harris
Registration district: Redruth
County: Cornwall
Year of registration: 1867
Quarter of registration: Oct-Nov-Dec
Spouse's name: Annie Pascoe
Volume no: 5C
Page no: 407

The 1861 Census that Asheppard found looks like the right family. In the 1871 census
William Harris is a blacksmith which ties in with 61 census.

1861 England Census about William Harris
Name: William Harris
Age: 14
Estimated Birth Year: abt 1847
Relation: Son
Father's Name: Richard Harris
Gender: Male
Where born: Camborne, Cornwall, England


Richard Harris 53 Copper Miner
Matthew Harris 27 Copper Miner
Richard Harris 21 Copper Miner
Thomas Harris 19 Copper Miner
William Harris 14 Blacksmith **
James Harris 12 Scholar
Mary Harris 5 Scholar
Ann Harris 26 Servant Housekeeper

All residents born Camborne Cornwall

1871 England Census
Name: William Harris
Age: 24
Estimated Birth Year: abt 1847
Relation: Son-in-law
Spouse's Name: Annie Harris
Gender: Male
Where born: Camborne, Cornwall, England
Civil Parish: Camborne
Ecclesiastical parish: St Martin
Town: Camborne
County/Island: Cornwall
Country: England

Jane Pascoe 54
William Harris 24 occ Blacksmith b c1847**
Annie Harris 22
William Harris 2

There are several possibilities for the names they could be from Annie's Pascoe family.

There are several possibilities for Jane Pascoe above - there is a marriage to a Nicholas Pascoe 1839 Camborne and in 1841 Census they had a daughter Nany b1849 Camborne, Nany/Nanny was often used for Ann/Annie and often transcribed incorrectly as Nancy.

The only way to be sure is to definitely get a copy of the marriage and find out their fathers names and occupations