Naacal is the name of an ancient people and civilization first claimed to have existed by British-American archaeologist Augustus Le Plongeon and subsequently by British occult writer James Churchward.
From pages xxiii - xxiv of the preface: "Perhaps also will be felt the necessity of recovering the libraries of the Maya sages (hidden about the beginning of the Christian era to save them from destruction at the hands of the devastating hordes that invaded their country in those times), and to learn from their contents the wisdom of those ancient philosophers, of which that preserved in the books of the Brahmins is but the reflection.
His knowledge remained incomplete, as the available tablets were mere fragments of a larger text, but Churchward claimed to have found verification and further information in the records of other ancient peoples.
Historian Curtis Wilgus from George Washington University noted that Churchward's books read like 'the strangest of fiction', with 'imagination' mixed with 'mystic fanaticism' and 'not the slightest erudition'.
[4] Engineer and writer L. Sprague de Camp dismissed the idea of the Naacal in an article written in 1946 on the subject of lost civilisations.