Dr. Dryden Darkwood

Purveyor of Fine Antiques
So, about that robe that I need you to fetch. It's being stored in the cellar outside. Just go out the back door right behind me, and once you're outside, just head to the left until you see the cellar door. You'll need to unlock it - here, use this key! Then, just head downstairs into the cellar and find my robe.

Back Door?
Oh, yes, we have a back door! Didn't I mention that before? Ha, ha… yes, I suppose you COULD have come in through the back to avoid fighting all those cursed antiques. But then, you wouldn't owe me 10 million gold, and I wouldn't have someone to send after my robe.

- Dr. Dryden Darkwood's Quest

Location: Cursed Antique Shop
Note: Also see Dr. Dryden Darkwood's Suit.

Thanks to Peachii.