Salazar and Serena walked into the estate from the road. Noone noticed them appear, and when they arrived at the door, the smiling butler allowed them in with a flash of the invitation.
Salazar calmly looked around the room, checking to see who there might recognize him closely. Out of all Bretonians, none, with the exception of perhaps Nelson, or one of the Knights of the Realm (And he had killed all but one of them) would recognize him through his disguise, even at close scrutiny.