Doctor Joseph Ritchie was an English

England

England is a country that is part of the United Kingdom. It shares land borders with Scotland to the north and Wales to the west; the Irish Sea is to the north west, the Celtic Sea to the south west, with the North Sea to the east and the English Channel to the south separating it from continental...

 surgeon

Surgery

Surgery is an ancient medical specialty that uses operative manual and instrumental techniques on a patient to investigate and/or treat a pathological condition such as disease or injury, or to help improve bodily function or appearance.An act of performing surgery may be called a surgical...

, explorer and naturalist

Natural history

Natural history is the scientific research of plants or animals, leaning more towards observational rather than experimental methods of study, and encompasses more research published in magazines than in academic journals. Grouped among the natural sciences, natural history is the systematic study...

.

In 1818 Ritchie was sent with George Francis Lyon

George Francis Lyon

George Francis Lyon was a rare combination of Arctic and African explorer. By all accounts a fun loving extrovert, he also managed to be a competent British Naval Officer, Commander, explorer, artist and socialite...

 by Sir John Barrow to find the course of the River Niger and the location of Timbuktu

Timbuktu

Timbuktu , formerly also spelled Timbuctoo, is a town in the West African nation of Mali situated north of the River Niger on the southern edge of the Sahara Desert. The town is the capital of the Timbuktu Region, one of the eight administrative regions of Mali...

. The expedition was underfunded, lacked support and because the ideas of Barrow departed from Tripoli

Tripoli

Tripoli is the capital and largest city in Libya. It is also known as Western Tripoli , to distinguish it from Tripoli, Lebanon. It is affectionately called The Mermaid of the Mediterranean , describing its turquoise waters and its whitewashed buildings. Tripoli is a Greek name that means "Three...

 and thus had to cross the Sahara

Sahara

The Sahara is the world's second largest desert, after Antarctica. At over , it covers most of Northern Africa, making it almost as large as Europe or the United States. The Sahara stretches from the Red Sea, including parts of the Mediterranean coasts, to the outskirts of the Atlantic Ocean...

 as part of their journey. A year later, due to much officialdom they had only got as far as Murzuk

Murzuk

Murzuk is an oasis town and the capital of the Murzuq District in the Fezzan region of southwest Libya. Murzuk lies on the northern edge of the Murzuq Desert, a desert of ergs or great sand dunes, and section of the Sahara Desert.-History:...

, the capital of Fezzan

Fezzan

Fezzan is a south western region of modern Libya. It is largely desert but broken by mountains, uplands, and dry river valleys in the north, where oases enable ancient towns and villages to survive deep in the otherwise inhospitable Sahara.-Name:...

, where they both fell ill. Ritchie never recovered and died there.