This reply may be somewhat belated but, if you're still trying to clarify your information, I may be of some help. The death locations for the Richard ancestors are not correct. We share the same great grandfathers through Noel Richard. Noel Richard actually hanged himself in Biloxi, MS. I have a handwritten copy of the Biloxi Daily Herald article describing his death. My great grandfather, Harry Edward Richard, is the brother of your gg grandfather, Jourdan. I know for certain Harry also died in Biloxi.
If you're interested and don't have it, I have ancestry information for the Richard family to France.