That smile made something in Percy's heart expand and grow warm, and he had to resist the urge to hug her or take her hand. They were in public still, and who knew who might come along? It wouldn't do to show any kind of affection towards her, just in case.
"I will," he told her, not quite able to keep all the excitement out of his voice, either. "After nine o'clock, and I'll use Hermes. We'll both think about it; a place that will be safe for us to meet."