I've come across Sir Guy Carleton, but a prior accomplishment to the stated information about him on that site.  I believe as governor of Quebec, which reads:

Murray's successor, Sir Guy Carelton, continued in much the same direction.  He continued the council form of government, and the Quebec Act of 1774 ratified it.  Like Murray, he believed that French-Canadians must be "inspired with a cordial attachment and zeal for the king's government."  The mixture of French and English legal practices caused such confusion and "chicanery" that in 1767 Carleton recommended revoking the Royal Proclamation of 1763 and leaving the "Canadian Laws" intact for the time being, or at least a modified version of them.  English criminal justice would remain but French civil law would continue with respect to issues such as property, inheritance, matrimonial rights, and paternal authority.  The Quebec Act of 1774 entitled Roman Catholics to practice their religion, provided a new oath of office that was inoffensive to Catholics, and stipulated "in all Matters of Controversy, relative to Property and Civil Rights, Resort shall be had to the laws of Canada."  Carleton interpreted this to restore the entire body of French civil laws, even in commerce.  "In this way," writes historian Peter Moogk, "the British goverment's humane pragmatism combined with one governor's naive enthusiasm for the French regime to bring about a continuation of French civil law in the Old Province of Quebec and in its successor, the modern Province of Quebec.*


He seemed instrumental in maintaining traditionally French that area within Canada.  Seems an unusual situation today, but perhaps that is how it came about to be.



*1763, The Scratch of a Pen, chapter: Endings and Endurance in French America.