Re: !!!
In the Classic supplement called The Great Weird North, Mounties are covered in a small amount of detail (there's a one page write up about them, and an archetype page). To quote the book, "they've become the Canadian equivalent to the Texas Rangers, except that the Mounties have fewer men, usually operate solo, and are charged primarily to study any strange events and report back. They only interfere when human lives are at risk, which of course, is often the case." They sometimes serve as judges in some proceedings, and are well respected almost universally (in Canada) even by the Indian tribes.
That book is mostly a location sourcebook for conducting Deadlands adventures in Canada, so they're presented in that context.