He KNEW That Both Rivers Were The Nile, As
He Bad Been Told This By The Natives; The One, Before It Had Joined The
Albert Lake - The Other, After Its Exit; But He Had Been Told That The
River Was NAVIGABLE From Gebel Kookoo, Lat.
3 degrees 34', straight up
to the junction of the lake; thus, there could be no great difference in
altitude between the lake and the Nile where he met it, in lat.
3
degrees 34'. Nevertheless, he found so enormous a difference in his
observations between the river at Karuma and at Gebel Kookoo, that he
concluded there must be a fall between Karuma and the Albert lake of at
least 1,000 feet; by careful measurements I proved the closeness of his
reasoning and observation, by finding a fall of only 275 feet more than
he had anticipated. From Karuma to the Albert lake (although unvisited
by Speke), he had marked upon his map, "river falls 1,000 feet;" by
actual measurement I proved it to be 1,275 feet.
The altitudes measured by me have been examined, and the thermometer
that I used had been tested at Kew, and its errors corrected since my
return to England; thus all altitudes observed with that thermometer
should be correct, as the results, after correction by Mr. Dunkin, of
the Greenwich Royal Observatory, are those now quoted. It will therefore
be interesting to compare the observations taken at the various points
on the Nile and Albert lake in the countries of Unyoro and Chopi - the
correctness of which relatively will be seen by comparison:
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