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
Manor of Orleigh assumed the name Lee, as he was required to do under his uncle's will, and purchased as his residence Dillington Manor near Ilminster in Somerset. He let Orleigh to his brother-in-law William Speke of Jordans near Ilminster, Somerset. Speke had seven children, all but one daughter having been born at Orleigh, including his eldest son the famous explorer and discoverer of the source of the River Nile, John Hanning Speke (1827–1864). The Speke family gave up their tenancy of Orleigh in 1845 and Mr Lee next let the house to Col. Bayly from 1845 to 1856 and then to Capt.