Good Morning Mark,
Thanks for your email.
My interest is with Daniel Heard,s first wife - Lydia Bell (married Tollesbury 26 May 1812 and died 29 Sept 1819), who had a daughter - Priscilla born 1813 (cannot find her birth).
After Lydia's death Daniel remarried your Phoebe Bell (m.30 May 1820 d 26 may 1870 Toll;esbury)
I believe Daniel's father was John Heard (b.14 Jan 1750 Tollesbury)who married Sarah Chalice 7 March 1784 Tollesbury (I think).
I have a will for a John Heard, which mentions a son Daniel, an Oyster Dredger, but I cannot be certain that this is the same John Heard.
This is as far as my research has taken me - hope to pursue further once time allows
Best wishes,
Nick Robinson