The Hamlet Project

If this means what I think it does, this line (so often cut) is both kind and cagey. He’s saying he’ll tell them why they were sent for so they don’t have to reveal any more, so that they can safely report back to the King and Queen without fear of being discovered to have revealed anything. It’s kind because he’s attempting to keep them safe. And cagey because it’s a way to get them to reveal more. I’m not sure which it is. Moult no feather is a pretty fun expression. I’m assuming it’s like ruffling feathers in meaning, that it implies no disruption of the feathers of the royal couple in any way.