London, Everett & Co., 1909. First edition, first impression. Hardback. A very good copy. A Yellow Peril thriller, where we find a city of Chinese inhabitants beneath an American city. Pretty straightforward racism. Translated by William Frederick Harvey. A little knocking to the board edges and corners. Trivial foxing to the top edge, some offsetting to the endpapers. [11039, Hyraxia Books].