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
Dillington House Court was William Speke of Jordans near Ilminster, father of the celebrated discoverer of the River Nile John Hanning Speke. It is now a Grade II* listed building. Dillington House was the country residence of George III's Prime Minister, Lord North who acquired it through marriage to Anne Speke. The stables which were built in the 18th or early 19th century were remodelled in 1875 by George Nattress and later in the 1960s when the Coach House was converted into a theatre. The two lodges adjacent to the main gate are also Grade II* listed and are in private ownership.