to allow a judgment on the author's matured conceptions on biological, psychological and metaphysical problems.

The first two volumes on The Foundations of a Creed laid down Lewes's foundation - a rapprochement between metaphysics and science. He was still positivist enough to pronounce all inquiry into the ultimate nature of things fruitless: what matter, form, and spirit are in themselves is a futile question that belongs to the sterile region of "metempirics". But philosophical questions may be susceptible to a precise solution through