The party’s investigative efforts begin to pay off:
The arsonists break under the threat of execution, and claim that all communication and payment went through a carriage driver named Alfred Eccleston. They also give up the location of their lair.
They track down Eccleston, who knows that the letters came from a man who frequently traveled to/from Cauldron Hill, and wore multiple disguises.
At the arsonists’ lair, the party finds letters that identify which factories to target. The handwriting on these letters matches the note they received from the shadow man.
Looking over the documents recovered from Wolfgang, they discover a connection where many of the factories documented in the report were later targeted by the arsonists and then purchased by proxies of Lorcan Kell.
The party, unsure of whether to trust or suspect Macbannin of being involved, heads up to his manor. After talking to him for a few minutes, Delft contacts the party to tell them that the note found in the warehouse (where the party fought the golem) matched Macbannin’s handwriting.
At this moment, a massive earthquake begins and witchoil erupts out of the ground. Macbannin orders his butler to “check on the lab”, and he and his house staff attack the party.
The party defeats Macbannin, and they tie him up. At his urging, they bring down to check on the lab as well. Once inside, they are attacked by a few flayed jaguars that got loose during the earthquake, but manage to put them down.