John Hanning Speke was a British explorer who is best known for his exploration of the source of the Nile. He was the first European to visit the Great Lakes of Africa and to discover Lake Victoria. His three-letter surname, SPEKE, is one of the solutions to the crossword. Dora Annie Isabel Shillingford, or TOT, was a British explorer who was the first woman to reach the summit of Mount Kilimanjaro. She was also the first woman to climb Mount Kenya. Her three-letter nickname, TOT, is another solution to the crossword. Eric Shipton was a British explorer who made several expeditions to Mount Everest. He was also the first person to make a detailed survey of the mountain. His four-letter name, ERIC, is another solution to the crossword. Francis Trevelyan Buckland, or CHESNEY, was a British explorer who was the first to explore the Dead Sea. He was also the first to explore the Caspian Sea. His seven-letter surname, CHESNEY, is the last solution to the crossword.