I want to have you here so I tell you what this did to me complete with the hand gestures and noises it deserves.
Quiet and inexorable, and hard in the middle because it's death and war and hate.
Their realisation of what they are to other, what the other is to them. And the memory of Regulus's body for Sirius. Ow!

Sirius considers lighting up another cigarette and seeing whether his role as an anguished brother and an enraged Black would let him get away with it. He would hope not. But these places, these people, they generally disappoint him.

Wow.