I waded through a lot of WP template pages and copied the text from the relevant pages. I would have done the "notice" boxes completely accurately, but I couldn't figure out the BBCode to do that, and the images for those boxes are maunally resized on-page, which I don't know how to do here, either.
Also, in case anyone's wondering, the Duke of Regulus was created, secretly, just before the Duke of Sutherland, meaning it is second ranked among all the dukes in the peerage of the U.K., but below the royal dukes, the dukes of England, Scotland, Great Britain, and Ireland (with the exception of the Duke of Abercorn, which it outranks).