Hello Val and Mabel Lucy,
Esther was born in Canterbury, on 8 April 1682 and was christened at the Walloon or Strangers Church there 16 April 1682. Her parents were Antoine Saumon and Marie Godran.
Nicholas Bachelier and Marie Rossignol were from Villeparisis, just outside Paris. They used the Huguenot temple at Charenton, and fled to London not long after it was demolished by Royal Decree in Nov 1685.
I am decended from Judith Bachelier who married Antoine Deverdun 1704 in Stepney. She is sometimes put down as a child to Nicolas Bachelier and Marie Rossignol, and certainly she named a son Nicolas, and members of the Saumon family stood as godparents to her children, so a relationship existed.
However, unlike the other children of Nicolas, absolutely no evidence exists to her being in London before 1704, and she gives her own birth place as Meaux rather than Villeparisis. A Jean Bachelier and Judith his wife came to England from Harleem Holland in Aug 1701. Antoine Deverdun also came from Haarlem Holland around the same time, and many of the couples who later stand as godparents to their children did so too. So I think perhaps more likely she was actually a daughter to this Jean and Judith, and Nicolas and Marie were extended relations, perhaps Uncle/Aunt.
Re tracing the family further back, to do so would require examining the Charenton Huguenot Temple records. As I understand it these are in private hands in France, and the one researcher who I found with access willing to do research quoted hundreds for just a 'look up', and much more for a full research. So my own research remains frustratingly stalled at that!
Regards
Richard