A tangled psychiatric mystery from a British writer better known for medically-oriented thrillers. Dr. Ewan Sutherland hopes to prove the validity of his unconventional theories on schizophrenia at the small hospital of Beauchamp Manor. But the hospital seems headed for disaster, precipitated by the suicide of nurse Claire Gasgoyne. And Sutherland himself is behaving erratically and blacking out when visiting his old mentor, Dr. Alec McLean. So McLean (no mean oddball himself) responds to this apparent cry for help and moves to Beauchamp Manor--where he finds a clutch of earnest psychiatrists, another suicide, a seeming plot to murder a young and wealthy patient. . . but no clue to the emotional turmoil of Dr. Sutherland. Finally, the search into Sutherland's looniness leads to the Isle of Mull and to--naturally--a tragic secret. Too much glib, superficial psychiatry, some clumsy stretches of prose--but stubborn, loyal McLean is a sturdily likable hero, and the rich local colors help to smooth out all those intricately interweaving neuroses.