<P>In the first half of the nineteenth century, only a small handful of Westerners had ventured into the regions watered by the Nile River on its long journey from Lake Tana in Abyssinia to the Mediterranean-lands that had been forgotten since Roman times, or had never been known at all. In <I>The Blue Nile,</I> Alan Moorehead continues the classic, thrilling narration of adventure he began in <I>The White Nile,</I> depicting this exotic place through the lives of four explorers so daring they can be considered among the world's original adventurers -- each acting and reacting in separate expeditions against a bewildering background of slavery and massacre, political upheaval and all-out war.</P>