 Le Plongeon advocated that the original, great civilization was in Central America which contrasts with Churchward's view.The next known published use of the word occurred in 1926 when James Churchward used the term in his book, "The Lost Continent of Mu, Motherland of Man".According to James Churchward, the Naacal were the people and civilization of the lost continent of Mu, as well as the name of their language.