As regards the breadth of the Ukara Lake, we read (p. 310), ‘Standing on the Eastern shore, Sádi said he could descry nothing of land in a western direction, except the very faint outline of a mountain summit, far, far away on the horizon.’ This passage is again suggestive. The sandy and level Eastern shore of the Nyanja (i. e. water) or Ukara Lake about Bahari-ni, whence Sádi sighted, it is probably in E. long. (G.) 35° 15′. The easternmost, that is, the nearest, point of the Karagwah, or, as Captain Speke writes it, the Karague Highlands, is in E. long. (G.) 32° 30′. Thus the minimum width is 165 miles, whilst man’s vision under such circumstances would hardly cover a dozen. Here, again, we have room for a First as well as for a Second Sea. Mr Johnston suggests that the mountain-summit in question might be an island rising high in the midst of the Lake; but, he adds, such a feature could not well have been missed entirely by Captain Speke. Here I join issue with him for reasons which can be deduced from these pages—my companion and second in command never saw or heard of the Ukara Lake. But it is highly improbable that those who could tell Sádi the number of days required to cross or to coast along the Lake would not have known whether the summit was that of a mountain on terra firma or of a lacustrine islet. The latter feature is not unfamiliar to Mr Wakefield’s informant: he does not fail to mention (p. 324) the small conical hill in the southern waters of the Baringo Lake. When Sádi declared that ‘he travelled 60 days (marches?) along the shore without perceiving any signs of its termination,’ he evidently spoke wildly, as Africans will. His assertion that the natives with whom he conversed were unable to give him any information about its northern or southern limit, simply means that in this part of the African interior neither caravans nor individuals trust themselves in strange lands, especially with the prospect of meeting such dangerous plunderers as the Wasuku. Similarly a ‘two months’ journey’ and ‘going to Egypt,’ asserted by ‘all authorities without exception, African and Arab,’ signify nothing but the total ignorance of the informant concerning the country a few leagues beyond his home. A lake 120 miles in length, that is to say, even a little smaller than the Baringo is supposed to be, will amply satisfy all requirements in this matter.