The Life Story of a Elver"" -- so reads the sub-title. But it is much more than that. It is a dramatic and vivid and beautiful panorama of a country, its people, its history -- with the river as protagonist. Some chapters recalled Hudson's Green Mansions in the graphic picture of jungle life. Vast amount of material, scientific and anecdotal and legendary and historical, of the native tribes, the races that penetrated the far reaches, the explorers and conquerors who came. One feels that, perhaps, it is over long -- and yet one hesitates to say what could be omitted. A great saga -- never before sung. And grand reading. One feels that Ludwig has gone into his innermost being for this book -- and laid aside the pot boilers, which have come from him now and again in recent years.