Tell him all you know and abandon your research
This page contains details about Fallen London Actions.
From: A Deal with a Devil
Game Instructions: This will trade a Deal with a Devil for a Brass Ring.
Unlocked with 1 x Deal with a Devil
He pulls a ring from his own finger and hands it to you. "A token of our agreement. […]"As you leave, he catches your arm. "Whatever others may say of the work we do here, it is just and it is important. Today you have been a part of that."
[Find the rest of the story at https://www.fallenlondon.com]