Hello Peter,
I was wondering, have you progressed in your search for Joseph Fraser. If so can you let me know.
You probably already know but you can find Abigail Merrifield in the Amsterdam Archives.
She was baptized 6/10/1690 in the Oude Kerk. Her father is Thomas Merijfield (Marrifield, Merrifiold)and her mother is Susanna Bodham. She has two brothers, Thomas born in 1691 and Hendrik born in 1693.
If you have found out more about the Fraser family please let me know.
Sylvia Vink