Sefa

Anyone out there familiar with Geneforge 2? I have Sharon's quest to go into the secret tunnel - but I can't find it. I've scoured Sharon's Grove on every border and throughout the center with no luck. Any one know where it is? Also, if anyone knows: where is Nora? In the walkthrough in the hintbooks from Spiderweb it refers to a quest given by Nora in Drypeak Warrens - but again, I can't find her any where in that zone. HELP! Please. Thank you.