Chapter 12 of 20,000 Miles Under the Sea, a science fiction novel by France's Verne, mainly talked about the correspondence between the divers Aronnaz and Dommum. In this chapter, Aronnax reported the results of his investigation to Dormam and asked for some information about Bethomas and Atlantis. Dormam was very interested in the situation of Bedomas and Atlantis, and expressed his willingness to assist Aronnax in his investigation. Aronnax gradually understood the secrets of Bethomas and Atlantis through his communication with Domam and decided to go to Bethomas Island to find the answer.