William Walker Atkinson (December 5, 1862 - November 22, 1932) was an attorney, merchant, publisher, and author, as well as an occultist and an American pioneer of the New Thought movement. He is also known to have been the author of the pseudonymous works attributed to Theron Q. Dumont and Yogi Ramacharaka Atkinson began to write articles on the truths he felt he had discovered which were then known as Mental Science. In 1889, an article by him entitled "A Mental Science Catechism," appeared in Charles Fillmore's new periodical, Modern Thought. By the early 1890s Chicago had become a major centre for New Thought, mainly through the work of Emma Curtis Hopkins, and Atkinson decided to move there. Once in the city, he became an active promoter of the movement as an editor and author. He was responsible for publishing the magazines Suggestion (1900-1901), New Thought (1901-1905) and Advanced Thought (1906-1916). When Atkinson wrote under the pseudonym Yogi Ramachakara, he claimed to be a Hindu. As Ramacharaka, he helped to popularize Eastern concepts in America, with Yoga and a broadly-interpreted Hinduism being particular areas of focus. The works of Yogi Ramacharaka were published over the course of nearly ten years beginning in 1903. This text is the exact reprint of the original 1904 version.