of the Book of Genesis could account for, led to the development, and popularity, of the Gap Theory (now known as gap creationism) to accommodate these discoveries. Gap Theory assumes a recent six-day creation, but also that the Earth existed for many ages before this event, ending in cataclysm and a new creation (hence its alternative title 'ruin-restoration theory'). In the early 19th century, "a heterogeneous group of writers," known as scriptural geologists, arose to oppose these discoveries, and the Gap Theory. Their views were marginalised and ignored by the scientific community of their time. They "had much the same relationship to 'philosophical' (or scientific) geologists as their indirect descendants, the twentieth-century creationists." Paul Wood describes them as "mostly Anglican evangelicals" with "no institutional focus and little sense of commonality." They generally lacked any background in geology, and had little influence even in church circles. From 1830 to 1833, the geologist and clergyman Sir Charles Lyell released a three volume publication called Principles of Geology, which developed Hutton's ideas of uniformitarianism, and in the second volume set out a gradualist variation of creation beliefs in which each species had its "centre of creation" and was designed for the habitat, but would become extinct when the habitat changed. John Herschel supported this gradualist view and wrote to Lyell urging a search for natural laws underlying the "mystery of mysteries" of how species formed. In 1857, Philip Henry Gosse published Omphalos: Untying the Geological Knot. The Omphalos hypothesis argued that the World had been created by God recently, but with the appearance of old age. This was largely ignored, and some considered it blasphemous because it accused the Creator of deceit. Some young Earth creationists would later incorporate parts of his arguments. Pre-Darwinian biology Erasmus Darwin published his Zoönomia between 1794 and 1796 foreshadowing Lamarck's ideas on evolution, and even suggesting "that all warm-blooded animals have arisen from one living filament, which the great First Cause endued with animality ... possessing the faculty of continuing to improve by its own inherent activity, and of delivering down these improvements by generation to its posterity." Advances in paleontology, led by William Smith, saw the recording of the first fossil records that showed the transmutation of species. Then, Jean-Baptiste Lamarck proposed, in his Philosophie Zoologique of 1809, a theory of evolution, later known as Lamarckism, by which traits that were "needed" were passed on. In