A bit of a disingenuous episode - but hey he's an actor and a jolly good one!
The De La Plagne genealogy is charted at
http://bit.ly/1F7C8wP The Greffier role appears to have been inherited from his father Paul in the wine region.
One major thing the programme left out is that Joseph's brother Alexandre also settled in London, so he was not alone. This seems a huge omission.
So Joseph 'couldn't get enough evidence' so shopped around and went on the attack in the Court Of Chancery where it was 'one person's word against another' and hearsay accepted without evidence. That was skipped over quickly!
Inclined to think there may be a grain of truth in the woman's (or more likely the woman's family and its male line) story. Her family may have been one of the contacts on the outside talked about earlier.
Agree about the possibilities of Joseph and Salome's son ... Born nine months after the marriage and he dies eight months after. The godfather thing ... Weren't godfathers sometimes the real father, although of course there may have been more than one godfather, so if it was that it wasn't necessarily the Duke but one of his set.
Strange how the silk weaving factories were introduced while of course it was pertinent to the Huguenots but not to Joseph who had a well documented inherited Bordeaux Guyenne feudal position ... (Guyenne btw had passed between English and French kings a few times) Wonder whether Joseph was involved in the financing of this trade and got revenue from it? Just a thought. And guess just because Manze (or to be genealogically accurate Manze and Cooke) was introduced doesn't mean to say the de la Plagnes financed the eel pie and mash business unless it turns out the LaPlagne family married into the Manze or Cooke families!
MAJOR UPDATE: This may be an ENORMOUS coincidence but it turns out, if it is verified, the original surname of the De La Bastide family into which Joseph De La Plagne married was De Jacques or
JACOBI!!! http://bit.ly/1iaAt4A And nobody thought to put that in the programme?!!! The pies and mash are on Derek! Hehe!