The Admiration of Station IX
From Fallen London Wiki
Gets you a new affiliation: "The Final Resting Place of an Old Friend" from a card called "Roc's Graveyard" which appeared in my hand when I returned to my lodgings after the final battle
The Final Resting Place of an Old Friend - Affiliation - +5 Persuasuve, +1 Mithridacy, Reduces Nightmares