"The Diary of a Royal Navy Pilot, D. Basilio Villarino, on the Exploration of the Rio Negro on the East Coast of Patagonia in 1782" is a book that tells the story of the exciting adventures and discoveries of the navigator and explorer D. Basilio Villarino on an expedition to explore the Rio Negro. In this diary, the author describes in detail his observations, encounters with local tribes and the nature of Patagonia, making this book a fascinating document about the history of exploration and discovery in South America.