I have had the most valued response from Colin Wilkes mentioned above. I now seek the assistance of someone who might have access to The Gloucester Records Office. I have eliminated the Berkeley Wilkes connections mentioned in my previous post. Charles Wilkes' place of birth is almost certainly St Catherne's in 1823, I have his likely siblings born to Samuel Wilkes and Maria Holder. They are Ann 1811, William 1813, Samuel 1816, Edwin 1819, and Harriet 1821. To confirm this supposition the given names William, Samuel, Edwin and Charles continued in Australia for at least two more generations, along with the name Hickling as a given middle name.
I already have accessed the 1851 census records for Gloucester and am in the process of assimilating this information.
A lookup for the 1851 census of London Westminster might locate Charles Wilkes who was resident of either College Street or Tufton Street employed as a Stone Mason also Wife Mary Piggin.
John Wilkes