"This extraordinary find diverted Price yet again, nudging him round one more twist in the path that was to lead to Athens, as he decided to specialise in the history of astronomical instruments. More than any other type of instrument, he was starting to realise that the earliest scientific devices related to the heavens – the equatorium, and before that the astrolabe, and the sundial. These were the devices that would lead him to the beginning of the instrument-makers’ story. They told him that stretching back centuries, people had looked to the dancing lights in the sky and felt the same urge as he did – to measure, to understand, and to predict. He wanted to know where it came from, the knowledge encoded in these instruments, and to trace this will to understand that connects hundreds of generations of human beings who have wondered at the passage of the stars."