Hi - I have been building info on my Burbage ancestry - William came from Yeovil b abt 1808 baptised 11 Sep 1808 in St Johns Yeovil. His parents were Joseph and Mary (really!) - Joseph was the son of Thomas and Elizabeth and Mary was the daughter of George and Susannah Hewlett I think
William moved to Battersea and had two wives, Elizabeth and Harriett - I have William buried in Wandsworth in 1897, and my mother was his great grand-daughter
If you are still researching, let me know if this helps
Terry Cook