In 1926 Lewis Spence published The History of Atlantis with Rider & Co. in London. He put the last phase of the island from near Gibraltar west to the 45th meridian, and from nearly latitude 45 north to about latitude 22, and he dated the final sinking near 9600 BC. Cro-Magnon and Azilian migrants are his two races. In the last chapter he gives up ready-made colonies and puts one shared set of customs in their place.
The book is a research argument. It is not a novel and not a channelled text. Spence says himself that the narrative has gaps and often rests on analogy.