As the Javary heads near the eastern slopes and spurs of the great Peruvian Cordillera, where once lived the powerful and wealthy Inca race with their great stores of pure gold obtained from prolific mines known to them, it is again not surprising that Mr. Lange should have stumbled upon a marvellously rich deposit of the precious metal in a singular form. The geology of the region is unknown and the origin of the gold Mr. Lange found cannot at present even be surmised.

Because of the immense value of the rubber product, gold attracts less attention than it would in some other country. The rubber industry is extensive and thousands of the wild rubber trees are located and tapped. The trees usually are found near streams and the search for them leads the rubber-hunter farther and farther into the unbroken wilderness. Expeditions from time to time are sent out by rich owners of rubber "estates" to explore for fresh trees, and after his sojourn at Remate de Males and Floresta, so full of interest, Mr. Lange accompanied one of these parties into the unknown, with the extraordinary results described so simply yet dramatically in the following pages, which I commend most cordially, both to the experienced explorer and to the stay-by-the-fire, as an unusual and exciting story of adventure.

PREFACE

It is difficult, if not impossible, to find a more hospitable and generous nation than the Brazilian. The recollection of my trip through the wilds of Amazonas lingers in all its details, and although my experiences were not always of a pleasant character, yet the good treatment and warm reception accorded me make me feel the deepest sense of gratitude to the Brazilians, whose generosity will always abide in my memory.