Check Upstairs
You leave the basement and arrive at a rather cliche, secret, bookshelf door. You can make out a conversation beyond the wooden wall.
???: "Okay what seems to be the problem fellow citizen?
Citizen?: "I've been up all night for the past week because of the strange noises emanating from Dr. Agony's house. I suspect that he is no normal scientist."
Detective?: "Hmm, I'll look into that further. As for now the more pressing concern is Dr. Agony's recent tax evasion. No surprise here considering his greedy ol' bottom always looks for antiques for his house."
Citizen?: "Yeah, the guy is such an oddity. This has led me to believe he has some sort of dragon special interest. He's always rambling on about how he'll get a dragon one day."
Detective?: "Heh, what a fool, everyone knows that dragons are forbidden on this island. Ever since Eroc Thgink came to power, he's been keeping the whole kingdom safe from such monsters."
Citizen?: "Indeed, I can't believe one would associate themselves with such barbaric creatures. I can't imagine that we once lived with them roaming our streets."
Detective: "Well it's getting really dark out, we'll continue this search tomorrow morning. We better leave before it starts raining hard."
what purpose does that wrench serve anywho?
You guess you can use it as a weapon, but it's also handy for undoing bolts.