GABY used to roll her eyes at her sister Suzie’s preposterous methods of settling her baby. Birdsong CDs! Radio static! Baby hammocks! Weeks after her own baby was born, Gaby was again awakened by Tommy’s cries. Drugged by fatigue, she changed him, fed him, hummed arias, but only when she traced tickly circles on his chest would he calm. So, half asleep, she kneeled down and, sticking her raised arm through the bars of the cot, drew circle after circle. When he finally fell asleep, she tentatively withdrew her hand and, entirely reasonably, commando-crawled out of his room.