"Earl, Sir Anthony, the heir of the Leibron family, is here to visit."
Perhaps noticing Hudson's confusion, the Guard Commander added, "He's the young man we saved from a caravan on the road a few days ago.
Also with him is an old magician. We have confirmed with Viscount William that they indeed belong to the Leibron family."
Hudson might not care about their identity, but that doesn't mean his subordinates won't. It would be embarrassing if the Master questioned them one day and they knew nothing.
Upon reaching the Flying Bear Fort, Tom immediately went to Viscount William to verify the identity of the "caravan members".
Unsurprisingly, without prior communication, Viscount William directly exposed them completely.
Reporting was originally intended, but the timing was bad. It happened during Hudson's busiest time, and was treated as an unimportant trivial matter, leaving it to the subordinates.