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.
What? Sure about what? I have not said anything. What is the list of your grievances? Your highness, I thought your grievances were here... and that you had agreed to dispose of the king using poison... but if you changed your mind! If any of us are caught this is high treason. I would never! I may have grievances, but you are mad to think I would dispose of the King. I may not be happy with a lot of things, but never! Where is my chambermaid. I need a new cusion! Ah, I see! So uhm, this map of the castle is probably not needed and... well I might as well return you the bribery money as well as the funds for the troops? I'd be careful of what you do and say! I know that most do not like that I have a lot of grievances. But it sounds like the treason is coming from you! I will make sure the King knows that there is treason here. and it is not by me. I may complain a lot but I know my boundaries! you baffoon! Your highness!!! I beg of you!! We met here for a reason!! If you have changed your mind it is not too late, no one will know!! At least allow me to leave the land with the money, I have done nothing but what you asked!!