It's all in the arithmetic – the same sort of arithmetic that Flamsteed, the Astronomer Royal, is probably grinding through at this very moment at the Observatory in Greenwich, toiling through the night in hopes of proving that Sir Isaac's latest calculation of the orbit of the moon is wrong. Except here Minerva 's the Earth, that schooner is Luna, and fixed Boston is, of course, the Hub of the Universe. Daniel passes an extraordinarily pleasant half-hour turning Dappa's steady observations into sines and cosines, conic sections and fluxions. Pleasant because it is imbued with the orderliness that taketh away his fear. Not to mention a fascination that makes him forget the throbbing and pulling stitches in his flesh.