Lower right hand side of map, at the pointy end of the boat is a door at -281 - 260 -100; enter it.
Run all the way down hall 'til you see Grumby. Hang a left, and go up the stairs. Go right just a tad and take the door on the left. Spin around and look left. There's your guy.
Edited, Aug 27th 2011 3:25am by Bonesmasher

Agrimony
Alkanet Root
Allspice
Bat Fur
Bat Wing
Benzoin
Birthwort
Black Gold Ingot
Bladderwrack
Blue Vervain Bulb
Buffing Sheets
Bulb Lotus
Bundle of Wormwood
Clover
Clubmoss
Dhea
Dihedral Burin
Echinacea
Elderberry
Empty Vial
Fennel
Figwort
Fine Hydroabrasive
Hydrangea
Jar of Acid
Lady's Mantle
Letters of Jonas Vol. 1
Lost Adventurer's Alchemical Notes
Mark of Dexterity
Medicine Bag
Mercury
Mullein
Mystic Ash
Prism Grains
Sage Leaf
Wolf Blood
Wrist Pouch