The numbers indicate pages. Numbers in boldface type refer to places where the persons in question are specially dealt with.
[Because the numbers indicate pages and each file in the web edition corresponds to an article in the book rather than to a page, you might have to go to the next article to read the pertinent passage. You can do this by clicking the >> at the bottom of each article. You can see the page numbers by looking at the source file -- in most web browsers you can choose Source under the View menu to do this.]