The Countess & The Endgame Walkthrough Part 2
Walkthroughs for Blackwell Convergence
Exposing The Meltzer Foundation
Once Rosa has awakened and the morning chat with Joey is over, your first stop should be the Park Gallery where you can pick up some interesting information.
Talk to Josie and ask her about Keeping the gallery open. The main points you must uncover in this conversation revolve around the fact that the death of Claude has made all of his art priceless overnight. This will also make it clear that the Meltzer Foundation has also had a sudden windfall, since they were her investors.
That would make the Park Gallery the second investment of the Meltzer Foundation that we know of to profit directly from the death of someone.
After your conversation with Josie you'll need to head back to the Roosevelt Island Lighthouse. You'll see a man there when you arrive, but don't bother having Rosa talk to him yet.
Switch to Joey and then click on the man's coffee cup. Joey will comment that the words Gold Tech are written on the cup. This is the clue you need.