Sadler presented this development to the group, and they generated hundreds of questions without full seriousness, but their claim is that it resulted in the appearance of answers in the form of fully written papers. They became more impressed with the quality of the answers and continued to ask questions, until all papers now collected together as "The Urantia Book" were obtained. The group was known as the Forum, and was formalized as a closed group of 30 members in 1925 who pledged not to discuss the material with others. Over time, some participants left and others joined, leading to a total membership of 486 people over the years from diverse backgrounds and a mix of interest levels. A smaller group of five individuals called the Contact Commission, including the Sadlers, was responsible for gathering the questions from the Forum, acting as the custodians of the handwritten manuscripts that were presented as answers, and arranging for proofreading and typing of the material. Bill Sadler, Jr. is noted to have composed the table of contents that is published with the book.