But maybe it's all Lord Saddler's ploy — leaving us vulnerable so that this third party will surface, if they even exist that is...

It's an unlikely possibility, but if a prowler is
already amongst us, then our plans could be ruined.

I guess the Lord thinks it's worth the risk, if
we're able to stop whatever conspiracy is at work.

At any rate, it's the Lord's call.
We will trust his judgement as always.