“Regulus, who said I miss my brother. Sirius has been crying ever since. Regulus hasn't said that, or anything even close to that, in ten years. Something he doesn't tell anyone else—that's what Evan asked of him, and that's what Regulus went with. I miss you, too, Sirius had thought, and maybe he whispered it, maybe Remus heard him, or maybe not. He's been crying too incoherently to know. But it's true. He's been missing Regulus for the last ten years.”
Book:Crimson Rivers