Art: Poet in the Square

All her adult life, Isabel Bishop, 58, has been obsessed with the idea of movement, but she herself changes outwardly hardly at all. Each morning, as she has for the last 26 years, she leaves her Riverdale, N.Y. home with her husband, Neurologist Harold G. Wolff, and boards a train for Manhattan. At Grand Central, the doctor and the artist part, he to go north by subway to his office, she to go south to her studio on Union Square. There Isabel Bishop calmly takes command of a world she has made her...