I forget where to get the other 2 deposit slips. I want to see if I can get the Marumasa (sp?) blade for my samurai. I heard the third one is a random drop. Since it isn't a live enemy drop, I guess the content of the King's treasury is already fixed.

In the Rapax cellar, there is a dunken guard captain which drops a key when killed. Use it in the captains quarters in upper rapax castle, and you get the 3 deposit slips. the 4th is the queens deposit slip.

The items you get are fix. IIRC Zatoichi Bo, Assassins Cap and some amulet. The Marumasa Blade is common in the Queens chest.

Thanks, Wereboar. I had passed that room many times, next to where you find the prince. Missed the safe in the wall. I don't have pickpocket ability so I killed the drunken Constable to get his key. The items you mention were there (with an amulet of rainbows). The Assassin Cap is handy (+20 crit hit). I replaced the Staff of Doom for the other Monk (RFS, I don't need him but I like him around) with the Zatoichi Staff. Being "not cursed", it gives me ranged weapons usage although I lose some instant kill chances (RFS weapons went from 15% to 5%). This party has enough IKs so it is a weapon worth getting (has more damage and initiative).