What's my goal here?
Hint 1 of 6:
The whole idea here is to find a way into Ketch's house.
Hint 2 of 6:
But it seems that the museum is closed for renovations.
Hint 3 of 6:
If you talk around some, you should learn that the guy who's surveying the
area has nothing but bad intentions.
Hint 4 of 6:
The Ketch sisters need some convincing on this.
Hint 5 of 6:
So, in short, your main goal here is to get your hands on Bronson's plans and
show them to the old ladies.
Hint 6 of 6:
In order to realize this, you should build a contraption for Bronson, so that
he has to leave his theodolite and plans.