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 Hanning Speke highlands of today's Rwanda and Burundi into the Lake across the Kagera Region of today's Tanzania. Much of Speke's "Journal of the Discovery of the Source of the Nile" is a description of the physical features of Africa's races, in whose condition he found "a strikingly existing proof of the Holy Scriptures." Living alongside the negroes, Speke found a "superior race" of "men who were as unlike as they could be from the common order of the natives" due to their "fine oval faces, large eyes, and high noses, denoting the best blood of Abyssinia" –; that is, Ethiopia. This