For instance, Gardner and Block note that Paper 85 appears to have been taken from the first eight chapters of "Origin and Evolution of Religion" by Edward Washburn Hopkins, published by Yale University Press in 1923. Each section of the paper corresponds to a chapter in the book, with several passages possibly used as direct material and further material used in Papers 86-90 and 92. (In addition to the book's "heavy indebtedness to Hopkins," Gardner discovered that Hopkins was a major reference in an earlier book authored by Sadler, adding to Gardner's view that it is more likely Sadler had a hand in writing or editing "The Urantia Book" than that celestial beings wrote it.) Likewise, much of "The Urantia Book" material relating to the evolution of mankind appears to have been directly taken from Henry Fairfield Osborn, "Man Rises to Parnassus: Critical Epochs in the Prehistory of Man" published by Princeton University Press in 1928.