PORTRAIT OF A MARRIAGE:
V. SACKVILLE-WEST AND HAROLD NICOLSON
by NIGEL NICOLSON
249 pages. Atheneum. $10.
She was Vita Sackville-West, the darkly handsome child of a great Kentish family, a minor poet and novelist (The Edwardians). He was Harold Nicolson, cherubic British diplomat, Member of Parliament, brilliant belletrist and historian (Making Peace, Some People). They were married in 1913 and stayed married for nearly half a century, inhabiting a succession of manors and gardens and picturesque ruins. Their union resulted in two gifted children and was for years regarded...