This is a pioneering work of medical history, written by James Ormiston McWilliam, a Scottish physician who served on an ill-fated expedition to the Niger River in West Africa in the mid-nineteenth century. The book provides a detailed account of the medical challenges faced by the expedition, which was plagued by outbreaks of fever and disease, and offers insights into the early history of tropical medicine.This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it.This work is in the "public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.