Hi,
I found this one,
Edmund WALLIS 
Christening Date: 27 Dec 1812 
Erith, Kent
Father's Name: William Wallis
No mother's name mentioned.
There are other children with parents William WALLIS and Ann/e born in Erith around this time, both before and after Edmund, so I wonder if her name has just been left out? They are,
Elenor WALLIS       14 Dec 1806  
Thomas WALLIS     18 Sep 1808 
Harriot WALLIS      25 Nov 1810 
Sarah WALLIS       19 Feb 1815 
Ann WALLIS          10 Aug 1817 
James WALLIS       24 Oct 1819 
Charles WALLIS       9 Jun 1822 
In case it's connected another couple Thomas WALLIS and Elizabeth, start having children in Erith in 1812, these are,
Hannah WALLIS     25 Oct 1812 
Cordelia WALLIS    24 Dec 1815 
George WALLIS       8 Nov 1818 
Matilda WALLIS      14 Oct 1821 
Stephen WALLIS    22 Aug 1824 
Hope this helps 

Regards
Daisy