[Regulus actually does smile back, although it speaks more of weariness than of any actual happiness or humour.]

Thank you for listening. [Even with his flares of anger at some of Sirius' responses, this has honestly gone much better than he'd expected.]

Bellatrix has it now. The Horcrux. Or... well, something that looks like it, at any rate. I didn't entirely manage to control myself when I saw that.

In any case, she knows a little more than I was hoping she would, by now.