Inside the revolutionaries' headquarters, you will find a map of the castle and the surrounding town.  Also, you will find a long list of grievances against the King, both by his subjects and the Queen herself.  In addition, there are crates full of weapons and armor, as well as a small vial of poison.
hidden revolutionaries' headquarters, Inside Palace
duke
queen
I need a new cushion for this throne! All this chatter in court is giving me a headache!  That Lord that just walked past offended my nose with his odor.  I need to find my chambermaid.
The better question is perhaps what are you doing here Duke? Are you plotting to overthrow the King! I would never! I heard of this place and wanted to see what these scum were planning for myself. Hmm, I'm pretty sure I saw that guerilla over there calling you sir and asking what he should do next. My Queen! You know I am loyal to the King. I would never betray the kingdom.  Even though the King has gone mad and become cruel? Even then you will continue to support the King? With my life, your majesty. Let me get this straight, You are in the revolutionaries' secret headquarters, they come to you for instructions and yet you deny that you are trying to overthrow the monarchy. It is hard for me to believe! It is all for the King. I want to get behind enemy lines, your Grace! Perhaps you have an explanation for what you've written in this book about how you should become the new king. Take a look and explain yourself. That is not my handwriting! I'm being framed! That's too bad. I think you would have made a fine choice for a new king. My husband must be stopped. You dare speak foul of the king! I will tell him at once!