Like a pair of comets drawn together, across a desolate void, by some mysterious action at a distance, they attracted each other across the greens and fells of Cambridge. Both were shy, and so early they would simply fall into parallel trajectories during their long strolls. But in time the lines converged. Isaac was pale as star-light, and so frail-looking that no one would've guessed he'd live as long as he had. His hair was exceptionally fair and already streaked with silver. He already had protruding pale eyes and a sharp nose. There was the sense of much going on inside his head, which he had not the slightest inclination to share with anyone else. But like Daniel, he was an alienated Puritan with a secret interest in natural philosophy, so naturally they fell in together.