Dr. Hobo's Map Quest
From A KoL Wiki
I think you find Hobo Jones' map in the Haunted Pantry. First you need something to extend your reach. Chewing gum on a string won't cut it here, but something else from the Market will. Think Indiana Jones, and equip your Cool Whip. Now, you need to switch Dr Jones' scalpel with something about the same size and weight, which is an asparagus knife, which you get in the Haunted Pantry. I'm Criswell, and I approved this message, even if the information is wrong.