In a review of a recent book by the writer, The Origins and History of the Mayas, Part I, Introductory Investigations, Los Angeles, 194S, Mr. J. Eric S. Thompson, of Carnegie Institution, levels criticism against what he considers its main thesis, the identification of the Itzas with the rulers of the Maya “Old Empire.” Although the full development of this thesis is planned for publication in Parts II and III of his work, the writer desires the privilege of making a brief answer to this criticism in the present journal.