Snape told Mcgonnagall about the detention many weeks ago, and she agreed it was necessary to visit him to see what was really going on. They apparated to Private Drive, and their walk was short to the desired destination. The four on the house shone for both of them as they made their way closer. "I shall inform you that I know his aunt slightly; they are not the biggest fans of witches and wizards, not that I think that will... or have been such a problem," he added before he brought his fist to the door and knocked firmly three times.