John Hanning Speke questions about the height and extent of the lake could not be answered easily. Speke's eyes were still bothering him and he only saw a small part of the southern end of the lake and his view was blocked by islands in the lake so he could not judge the size of the lake well. However, Speke did estimate the elevation of Lake Victoria at 4000 feet by observing the temperature at which water boiled at that level. (This lake's being substantially higher than Lake Tanganyika did make it a more likely candidate for the source of the Nile.) From
John Davis (English explorer) Sheriff of Devon) and Dorithy Bourchier, the daughter of the Earl of Bath. He had five children: his first son, Gilbert was baptised on 27 March 1583; a daughter Elizabeth who died in infancy; Arthur, born 1586; John, born and died 1587; and Philip. John Davis (English explorer) John Davis or Davys (c. 155029 December 1605) (b. 1543?) was one of the chief English navigators of Elizabeth I. He led several voyages to discover the Northwest Passage and served as pilot and captain on both Dutch and English voyages to the East Indies. He discovered the Falkland Islands (today a