Okay. Since it looks like the rebels will win soon anyway, I've pulled out a couple of people who aren't able to play any more and posted the lynching.
Since I suspect that the setting was popular, though, and the real problem was mainly the sheer number of players (and to a lesser extent, the ratio of rebels to councilors); I'm willing to try Carisbrooke Castle again, with my usual max of twelve players, if there's still that much interest. If necessary, a second game (same setting or not, as you like) can be started up once the first one is underway. :)