Thanks once again everyone.
This John Spooner was born in Towcester, Northamptonshire, baptised around 1792. He was the son of a John Spooner, and Sarah Kingston. He married Maria Sage at Christchurch, Surrey, on the 29th of October 1817, by Licence. John became a School Master, sometime before 1841: I know this because his Daughter Agnes Spooner, married Henry Allen, at the parish Church of St Giles, Camberwell, on the 7th of February 1841, and John's profession was down as: "School Master". I found John at Camberwell as: "School Master", with a Maria, in the 1841 Census.
His oldest Daughter Maria Sarah, married someone with the surname of Linton, in 1836. Both John Spooner, and Maria Linton were Witnesses to Agnes Spooner's marriage in 1841.
John Spooner, and Maria, were at St Mary Newington, Lambeth, in the 1851 Census.
In the 1871 Census John Spooner: "Retired School Master" is at Camberwell, Lambeth, with his Wife Maria. John Spooner died in 1873, in Camberwell.
I decided to find out about this John Spooner, because I know for a fact that one of my 5x Great Grandad's, William Spooner, was a Linen Draper. And from the: "Old Bailey Online Proceedings" dated Dec 1816, he had a Brother called John who was: "Officiating in his shop for him, on the 6th of November": So from this, it may have been possible that John Spooner could also have been a Linen Draper. William Spooner's shop was at Chiswell Street, Finsbury.
In the 1841 Census, my William Spooner was living at Clerkenwell, and was a: "Commission Agent". I know from this Census, that he was not born in Middlesex. William Spooner died on February the 17th 1845, at 27, Cheapside, London. His age was put down as 58.
Because William Spooner died before the 1851 Census, I decided to look for William Spooner's who were born around the same time as mine: If I found them in that 1851 Census, I could obviously eliminate them as being my William Spooner. I also went on "Freereg" and looked up William Spooner's born around those years, and who also had a Brother called John.
The only one that would fit was William Spooner, baptised 24 Aug 1787, in Towcester. He is also the only one I know, whose Brother became a Linen Draper. The only problem is, the 1871 Census, is the only one that fits well with John's age. He is down as: "Retired School Master". But on all of these Census returns, he is with his Wife Maria. And on all of the other Census returns, his occupation is down as: "School Master". On the 1861 Census, he appears to have been transcribed as: "John Spooneck", or something like that.
Also, John Spooner, baptised 1792, in Towcester, had a Sister called Agnes, baptised in 1793: This was the name of John Spooner's second Daughter.
John's first Daughter was baptised Maria Sarah: Sarah was his Mother's name.
I have also looked on these old maps, to find how close John's abode would have been to William's address in Chiswell Street, Finsbury, just next to Finsbury Square. And the distance is not much more than 1.5 - 2 miles: He only had to go across Blackfriars Bridge, then down a few other streets, on the other side of the water, and he was there.