The typical disadvantage of doing this through Legilimency instead of a Pensieve is that within the mind you’re more subject to what the person behind the memory was focused on. The advantage is that you can absorb the knowledge at the speed of thought. But here, now, there is no disadvantage because the Malfoy heir was focused on Marvolo’s consort a great deal. In the space of a few minutes Marvolo picks up that everything Hermione said was true, if not an understatement. At least Snape will only be co-teaching Defence Against the Dark Arts this year; only a few lessons a week. Still, we have much to speak about and perhaps I should take him off teaching entirely.