George Poulett Scrope fostered a number of friendly relationships with some well-known natural philosophers. On his voyage and during the years since, Charles Darwin sent some letters to Scrope, checking certain geological observations and calculations he made, and made other general geology and scientific (in our modern terms) queries. These documents are mentioned by numerous sources, but were unavailable for review by this researcher. During the mid-1820s, George Poulett Scrope came upon the greatest friendship of his life. Despite, and perhaps because of, Charles Lyell's objective appraisals of Scrope's first and certain subsequent works, the pair forged a strong friendship that lasted for the rest of their lives. While Lyell's uniformitarianist views were not to George's liking, he found solace in Professor Huxley's theories. One author described the early nineteenth century, the time of George Poulett Scrope and Charles Lyell's early careers, as an "intellectual 'reign of terror'" which was the "consequence of the unreasoning prejudice and wild alarm excited by the early progress of geological inquiry." Most attempts to explain the past using current processes as a reference was, rather than through calm argument, met by social stigma and intolerance. This can be seen by the treatment of Hutton's Theory of the Earth, Hall's meticulously kept records and experiments, and Playfair's Illustrations. These arguments had "come to be inscribed in a social Index Expurgatorius [and] might have seemed to be consigned to total oblivion." The writer of Scrope's Obituary in the Royal Society's Proceedings believed that "science is indebted for boldly encountering and successfully overcoming this storm of prejudice ... [Scrope and Lyell] accomplish[ed] the removal of geology from the domain of speculation to that of inductive science." Based on Scrope's various arguments, he became a Huttonian in that he did believe that causes in operation currently were able to have produced past geological changes – the present is a key to explaining the past. He rejected aqueous origins and Von Buch's elevation-crater theory – which held that craters were caused by the buckling of the crust below them. Because the friendship of Scrope and Lyell featured a "freedom of intercourse" it was of great value to the pair in fighting conventional thought and its errors. Lyell wrote favourable reviews of several of Scrope's papers during the 1820s and 1830s, lending some of his considerable influence. Upon the release of Lyell's Principles of Geology, on parts of which he