Hey Richard, it's interesting that your father was so involved in following the litigation.No one still alive in my family even remembered it.Is it possible that you are not only a descendent of Mathieu in your paternal line, but also of Urbain in one of the lines?That might explain his knowledge of the suit.
One thing a few of us are working on right now is tracking down the attorneys who filed the claim on behalf of the Corporation Tessier-Lavigne. What we hope to find is this mysterious genealogist that was hired to "certify" everyone's claims. Since the claim is supposedly still being pursued, the claims of the heirs and all of the supporting documents would have to be fully accessible to the attorneys.
So far, we've contacted Monique Nanthier, the archivist for the Basilica, and Marc Lacasse, the archivist for the Order of St-Sulpice.Monique is also going through some contacts to try to put us in touch with a former CBC broadcaster named Marie Tessier-Lavigne, who she feels will have the contacts and media archive access to dig up more details on the "active" part of the claim.
If anyone knows who the attorney(s) is/are, please let me know.Will let everyone know if we're successful in updating the story.