Both these are available on the Ancestry
Her parents are Charles Haveis (Havies)and Hannah Allen
22 Sept. 1807 St Dunstans & All Saints in the parish of Stepney.
The IGI will help you for:
Susannah's surname is recorded as Avis. 15 Feb 1816
(recorded 22 Sept) Charles is baker of Foxes Buildings Kent St for which no Poll Books exist according to the LMA.