What do you mean with her treasures? Do you mean the hint that she hid a chest? You can find it youself if your stats are good enough. My Mage found it herself. But if you can't and if you saved the boar that was attacked in the NW area of the cave. The boar will lead you to different hidden spots and one of them is the chest. Look around path crossings!
The Lake is in the North of the cave when you follow all paths you will find it too.
