My paternal grandmother was a Clark from Bures. I've been researching her family. Looking at my 5 year old notes, I have the following fragments to offer you.
A Joseph Clark was born in Bures approx 1806. He married Susannah Hum (born 1804, surname?) in 1825. I've found 4 children; William b1827 (my ancestor), Henry b1833, Mary Ann b1839, Harriet b1846. Jospeh first appears in the 1871 Bures census and is there in 1881.
Another researcher has Jospeh Clark b1811 married to Harriet (Williams or Weller?). He is in the 1841 and 1851 census as a horsekeper in Whitefriars, Fleet St London without his wife, but with Mary and Henry. They had 5 children; Henry b1832, William 1834, Mary Ann 1838, Elizabeth b1846 and John b1846.
There is a Henry in the 1851 and 1901 censuses.
A Jospeh appears in the parish records in 1838, exempt from paying rent, along with a Thomas Clark.
The first two fragments do seem to share common elements e.g. Henry and Mary Ann. Did Joseph's firts wife die and he remarry?