[Vassago]

There should be 5 corridors in the main area of level one of the Vale. 3 of these corridors are locked doors. The other 2, I believe are not doors. Within those corridors, I believe you will find the keys to unlock the other doors. Be sure to check each area for various treasures. A tip to help you out is to hold the "Alt" key. That will hilight any area where a treasure can be found or a door that can be opened (either by key or just by hand). You can move your characters around while holding the "Alt" key. It's very useful in places like the Severed Hand.