The lost continent of Mu

"All matters of science in this work are based on the translations of two sets of ancient tablets. Naacal tablets which I discovered in India many years ago, and a large collections of stone tablets, over 2500, recently discovered by William Niven in Mexico."--Preface

The lost continent was "in the middle of the Pacific ocean where now 'we find only water and sky, ' and groups of small islands, which today are called the South sea islands." cf. p. 46