Hi. It has been years since you posted this thread about John and Ann Dickerson but I have information about them which was given to my gt grandfather George Dickerson (Wymington, Beds). He obtained a full genealogy chart complied professionally in USA. A relative also George Dickerson who came over to the UK to introduce himself and pass on the information.
Ann was buried on 20 Jan 1770 along with her son William who was born on 14 Jan 1770. John Dickerson then married Susannah Brown 12 Oct 1770. They went on to have 8 children and possibly a 9th who I am descended from (Joseph b. 1793 Wymington, Beds)
Please contact me if you would like the genealogy charts forwarding.