Every tree (Family Search & Ancestry) point to Henry and Margaret Duhamel; but there is not one shred of proof. I recently discovered a book printed in 1862 that leads to Amos Duhamel as her father.
As an aside ...
Here are some Articles in the 'FamilySearch' "Wiki":
Hiring a Professional Researcher
Hiring Record Agents and Professional Genealogists (National Institute)
Just thought that they may help, if necessary.