Hi,
I was e-mailing with Vincent regularly for a while. Some of my stuff is posted on the site under the "Families related to Sohier" section. David des Marets to be exact... He's extremely interested in the America's branch of the Sohier family, the French and Huguenot/Walloon were right at home for him. His main interest is a few Sohier (Sawyer, etc...) that are in Mass. and other NE States. But,...Marie is probably the most well known Sohier through the line of David des Marets (and all other variations, mine is Demarest).
By all means, take your time and e-mail back and forth with Vincent. That should ease your mind. I have come to see him as just as much of a relative as most of the des Marets I have e-mailed with. He also sees the huge link between Sohier and des Marets. The branch of Sohier (Vermandois..Spelling suspect) is quite interesting. Enjoy.