User blog comment:Roranoa zoro/Wikia founders/@comment-3273232-20110525062013/@comment-13301-20110525091942

There's no such way to scroll back in recent changes. Also, old RC entries are cleared.

You should chech the rights log AND the Special:ListUsers. If there is a bureaucrat without a match in the rights log it's a founder. Otherwise, search the rights log for a bureaucrat right removed.