The entrance to the hangout is near(2)the tower itself.
You simply need to go Northwards and then to the East.
Once you encounter two ghouls, this means that the entrance to the Lost City is close.
As you enter, you should probably be very well prepared.
A big supply of potions and scrolls is recommended here.
The minimum suggested party level is 15, but it is difficult then anyways.
Once you enter(3)you should quickly locate the bridge to the castle(4).
Kill the two guards and kick off the gate with the key that they drop.
At the next level(6)trifling is over.
Here, you might even be attacked by a dozen of enemies, at a time.
This is where Montbard is(7).
Once you find him, there is no point in descending any further.
This way, you will get to Seahaven.
Then, you only need to return to Morgan in the castle and the quest will be over.
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