Joseph Leadbeater and Sarah Evans were my great great grandparents and were married on 12th June 1848 in Old church St Pancras. I am a descendant of their son John Henry Leadbeater who was born on 6th September 1854. I have no record of Sarah after that date but the census records of 1861 onwards show Joseph having children by Harriet Osborn who it appears he married only in March 1871 when he is shown as a widower. Harriet was born in Bristol about 1836 and died in Clerkenwell on 28th January 1903. In the 1891 census William their son is shown as a Carpenter.
Joseph's parents were John Leadbeater and Mary Leadbeater who lived at Middlesex Place according to the 1841 and 1851 census. They had five children, Lydia, Joseph, Susan, John and Mary. I have some additional information relating to Lydia, Susan, and John which you are welcome to.
I also believe that John Leadbeater ( Joseph's father)was born in Islington on 14th november 1793 to Joseph Leadbeater and his wife Susannah. This John had a sister Esther who was born in February 1796. John was a whitesmith by occupation according to the 1851 census although he is shown as a coal merchant on the wedding certificates of his children Lydia and John in 1854.
The other occupation which runs through some of the early generations is compositor/printer and one of my uncles worked in this trade ubtil he retired.
I would be interested in swopping information with you if you are interested
You can contact me by e mail on Charleville@hemscott.net
Please excuse the poor spelling etc in the first message