John Hanning Speke was an officer in the British Indian Army who made three exploratory expeditions to Africa

Africa

Africa is the world's second largest and second most populous continent, after Asia. At about 30.2 million km² including adjacent islands, it covers 6% of the Earth's total surface area and 20.4% of the total land area...

 and who is most associated with the search for the source of the Nile.
Speke was born on 4 May 1827 in Bideford

Bideford

Bideford is a small port town on the estuary of the River Torridge in north Devon, south-west England. It is also the main town of the Torridge local government district.-History:...

 in Devon

Devon

Devon is a large county in southwestern England. The county is sometimes referred to as Devonshire, although the term is rarely used inside the county itself as the county has never been officially "shired", it often indicates a traditional or historical context.The county shares borders with...

. In 1844 he was commissioned into the British army

British Army

The British Army is the land warfare branch of Her Majesty's Armed Forces in the United Kingdom. It came into being with the unification of the Kingdom of England and Scotland into the Kingdom of Great Britain in 1707. The new British Army incorporated Regiments that had already existed in England...

 and posted to India, where he served under Sir Colin Campbell

Colin Campbell, 1st Baron Clyde

Field Marshal Colin Campbell, 1st Baron Clyde GCB, KSI was a British Army officer from Scotland who led the Highland Brigade in the Crimea and was in command of the ‘Thin red line’ at the battle of Balaclava...

 during the First Anglo-Sikh War

First Anglo-Sikh War

The First Anglo-Sikh War was fought between the Sikh Empire and the British East India Company between 1845 and 1846. It resulted in partial subjugation of the Sikh kingdom.-Background and causes of the war:...

. He spent his leave exploring the Himalayan Mountains and Mount Everest

Mount Everest

Mount Everest is the world's highest mountain, with a peak at above sea level. It is located in the Mahalangur section of the Himalayas. The international boundary runs across the precise summit point...

 and once crossed into Tibet

Tibet

Tibet is a plateau region in Asia, north-east of the Himalayas. It is the traditional homeland of the Tibetan people as well as some other ethnic groups such as Monpas, Qiang, and Lhobas, and is now also inhabited by considerable numbers of Han and Hui people...

.

In 1854 he made his first voyage to Africa, joining an expedition to Somalia

Somalia

Somalia , officially the Somali Republic and formerly known as the Somali Democratic Republic under Socialist rule, is a country located in the Horn of Africa. Since the outbreak of the Somali Civil War in 1991 there has been no central government control over most of the country's territory...

 led by the already famous Richard Burton

Richard Francis Burton

Captain Sir Richard Francis Burton KCMG FRGS was a British geographer, explorer, translator, writer, soldier, orientalist, cartographer, ethnologist, spy, linguist, poet, fencer and diplomat. He was known for his travels and explorations within Asia, Africa and the Americas as well as his...

.