For a long moment Sirius frowns, clearly up on the idea that Harry had something more to say but shoved it down. Then he focuses on the question. "Er. I knew he had a reputation for getting on along the path of immortality. My mother --" He sneers here. -- "was awfully impressed with it all. Awful, spiteful bitch in general, my mother, but she admired him as much as she feared him for some reason. I reckon more than I expected even for a Black well into the Dark Arts herself."