Hi there:
When you first enter the area, you can see Algher behind a barrier. You will have to take a circuitous route to get to him, fighting your way through various creatures. Depending on your party, that might take about 30 minutes. Just keep following the "path" (some rooms are dead ends) and eventually you will get to him. There is only one entrance and when you find Algher the exit will be down the end of a hall. Good luck!
