Of all man’s motives for murder, surely one of the commonest takes its shape from the triangle of love. Crimes of passion are universal. They are eternal. They add the luster of romance to the plain brutality of an unsolved killing. And when the hypotenuse of that triangle is none other than the queen of England, Elizabet the 1st, the case takes on a historical dimension as well. So it was, on September 8, 1560, when Amy Robsart was found dead at the foot of the stairs in her country home at Cumnor Place, about three miles from the town of Oxford. She was twenty-eight years old.