A human would just have seen a man up on the roof, blurrily lit from below and most likely unrecognizable. But Rowan had a vampire's phenomenal senses. She could see the face of the man up there.
And as his eyes met hers, she could feel something happening inside her head. Rowan could recognize his face and remember just who he was and what he meant.
The figure on the roof turned, and Rowan snarled. Samuel Lanner, where in the nine hells do you think you're going? Even as she thought it she was making her way to the fire escape, barely bothering to check if anyone was watching as she leapt onto the lowest level and started racing up the metal steps.