To hope to cast a new light on William Williams, Pantycelyn, after the exhaustive scholarship of Gomer M. Roberts and Saunders Lewis, not to mention scores of other treatises, one must indeed be almost naively sanguine.

Preface.

Jupiter is reckoned to be three hundred and forty three million miles further from the sun than the earth is; and consequently the sun's heat and light are twenty seven times less powerful there than here; its size, some maintain, is four hundred times that of the earth, and therefore Jupiter was put to rotate on its own axis, a process it completes in ten hours, so its deficiency in degrees of heat and light is compensated because it receives them more frequently.

William Williams, Pantycelyn.