Rulers of Kings by Gertrude Atherton

For twenty-four hours Ranata's brain whirled to no machinery but her wrath. To that succeeded an energetic desire to escape. All her prejudices and separate ambitions had gone down in that final moment of disillusion, and she was determined to marry Fessenden Abbott as soon as she was beyond the reach of her father. But her brain, fertile as it was, and abnormally active, could conceive no method of leaving unobserved that great palace of many corridors never for a moment deserted. She was forced to relinquish her intention to bribe the guards, for there were constantly three together, and it would seem that they were changed every half-hour. To assume the disguise of a servant was equally impracticable, for not one of those in attendance upon her reached her shoulder, and they were as closely watched as herself. Her rooms were not high above the ground, but a guard paced beneath her window day and night, and the guard-room was opposite.

She was in the very heart of a great European capital preeminent in science and art, the civilized virtues and vices, not a hundred yards from cabs and crowded streets, and no mountain fortress could enclose her more securely.