“The Tvvoo Bookes of Francis Bacon. Of the proficience and aduancement of Learning,divine and humane. To the King. At London. Printed for Henrie Tomes, and are to be sould at his shop at Graies Inne Gate in Holborne. 1605.” That was the original title-page of the book now in the reader’s hand—a living book that led the way to a new world of thought. It was the book in which Bacon, early in the reign of James the First, prepared the way for a full setting forth of his New Organon, or instrument of knowledge.