Hello Mari,
I'm your cousin Joseph Joubert from NYC. My Dad Rev. Samuel Joubert Sr. was Alcide's nephew. I have all the info you are looking for. I've done an extensive search on the Joubert's. Edmond Joubert Sr. was the mulatto son of Louis Joubert and Ellen Tom(a slave that was emancipated by Pierre Joubert Sr. Feel free to email me directly at-
joejoubert@comcast.net