Re: Joseph Nicholls + Elizabeth Spencer, Coventry 1852
I know your post was some time ago and you may well have progressed with your Nicholls family.
I have found on the 1841 census a Alexander Nicholls 45 watch polisher/finisher with a Joseph Nicholls aged 9 who may be your Joseph who marries in 1852. They are living at 15 Spa Cottages , Lloyds Row, Clerkenwell, London.
The reason i have interest in them that a 18 year old William Dunn silversmith is boarding with them and he may possibly be apprenticed to Alexander. I need to find out more on him.
Hope it helps