How Bomba met two white rubber hunters, Gillis and Dorn, and won their gratitude by saving their lives when their camp was attacked at night by jaguars; how he trapped the cooanaradi when it pursued him; how he drove off the vultures when they assailed his friends the monkeys; how the latter came to his aid when the cabin was besieged by the headhunters--these adventures are told in the first book of this series, entitled: “Bomba the Jungle Boy; or, The Old Naturalist’s Secret.”