Sylvia Meagher was 44 years old in the fall of 1965 and lived alone, except for her cat, Allegra, named after the ballet dancer Allegra Kent. She commuted from her one-bedroom apartment in the West Village to the United Nations, where she’d been working for nearly two decades at the World Health Organization. Although Meagher was a bureaucrat, her sensibilities were bohemian. She was acquainted with many of the painters, musicians, and writers who lived near her. In her foyer, Meagher displayed