"It’s a trick I learned accidentally with Harry over the winter," Sirius said, moving his hand in slow circles across Teddy’s back. "He wouldn’t stop screaming. It felt like hours, but it probably wasn’t that long. I finally took him outside, just to get out of my flat’s four walls before they closed in on me. He stopped crying instantly. I think he needed a change of scenery or something. Or maybe the cold air just surprised him into silence. Either way, it usually works."