Sirius looked out of the fire at Harry, a crease between his sunken eyes.
“You’re less like your father than I thought,” he said finally, a definite coolness in his voice. “The risk would’ve been what made it fun for James.”
“Look —”
“Well, I’d better get going . . . I’ll write to tell you a time I can make it back into the fire, then, shall I? If you can stand to risk it?”
There was a tiny pop, and the place where Sirius’s head had been was flickering flame once more.

Autore: J.K. Rowling