Hi Ron,
I don't have a William born 1827 nor do I have an Ada Stockbridge. My Jonathan's parents were William and Elizabeth Peters who married in Melbourn in 1803. They had the following children: William 1804, Sarah 1806, Thomas 1809, Ann 1810, Mary 1811, Jonathan 1813-1857, Elizabeth 1815, Susannah 1818, Joseph 1821 and Jane 1823. One of these children may be your William's parent.
Good luck with your research.
Regards,
Melanie
Bowral NSW