He knew ballroom, which meant he'd been taught, which meant he probably was from a well-to-do family of some sort. Then again, Artemis had been taught as well, and her family was definitely not well-to-do, so what did that say? He was very well-mannered, but she knew how to behave cordially as well, so that was no help in pinning him down. Nor for him to pin her down, either.