He plucked one of them at the same time Harry and I arrived at the pensieve. He slowly made his way to us and spoke, "I have come to acquire this particular memory of Bob Ogden. He was a wizard who worked for the Department of Magical Law Enforcement in twenties." He slowly poured the memory into the pensieve. The magic started to swirl and illuminate in my vision. "What’s important is that he had a rather peculiar interaction with the Gaunt family."