Once again the well-known and well-liked Edgar Wallace characters take the stage, -- Commissioner Sanders, Captain Hamilton and the beguiling ""Bones"" Tibbits. This time the exploits of Englishmen and natives in Africa stress the humorous rather than the thrilling, with here and there a ghost palaver, native insubordination, etc. ""Bones"", inveterate hobbyists, experiments in all directions and the good-natured, illiterate Cookney subordinate is the most appealing figure in the book.