Don't read this unless you've completed day 3.
This is what you know:
Harry Jones killed an Orb to avenge his father. He went to Greenwood Cemetery and left the Orb behind.
Harry went to his theater and probably put the note in his safe.
He went to Abdul's Pawn Shop and met Phil.
They picked the right symbols at the Pawn Shop and were granted access to the tunnel beneath the shop.