That one becomes available in Milady's Vengeance. All the higher level sidequests and sidequests that require travel towards England don't become available until Milady's Vengeance (because presumably the player wouldn't reach a high level in Queen Anne's and the player is locked from travel towards England for a lot of Queen Anne's, so I didn't want to have inaccessible sidequests). That's why you don't see the "Requires X honour" popup when talking to Gerome. I need to contact the tutorial writer and see if she can add some notes regarding Queen Anne's vs. Milady's Vengeance.