324 Reviews— Br. J. W. Gregory's Great Rift Valley. 



this be if these shelves were formed by the sea? The line in Glen 

 Gluoy, so much higher than any in Glen Roy, corresponds with its 

 higher col ; the three in Glen Roy all correspond with openings out 

 of that glen and Glen Spean into the greater valley of the Spey. 

 Did the " pauses " in elevation, " during which the roads were 

 made," vary in these glens, and not affect others at all ? It is surely 

 impossible to imagine that the degree of submergence, and then of 

 re-elevation, had any reference to the height of these cols ; or that 

 these " pauses " happened to take place, in every instance, just when 

 the sea reached their level ! 



This fact, in our humble judgment, is of itself conclusive against 

 the " marine submergence " theory ; and, indeed, constitutes, as Mr. 

 Jamieson has remarked, & fourfold proof \n favour of the alternative, 

 or "lake-theory." It shows, we think, in the clearest manner 

 possible, that these " roads " were due to a local cause — to this par- 

 ticular group of glens being at one time blocked to the level of their 

 highest cols, and subsequently in a smaller degree, to that of the 

 side-co?s ; and that then the water, the natural drainage of the glens, 

 found egress successively by the lower outlets, as these became 

 available for it. 



EEVIEWS. 



I. — The Gkeat Rift Valley, being the Narrative of a Journey 

 to Mount Kenya and Lake Baringo ; with some account of 

 the Geology, Natural History, Anthropology, and Future 

 Prospects of British East Africa. By J. W. Gregory, 

 D.Sc. (Lond.), F.G.S., F.R.G.S., F.Z.S., of the British Museum 

 (Natural History). With Maps and Illustrations. Royal 8vo, 

 pp. xxii and 422. (London, 1896: John Murray. Price 21s.) 



(WITH PLATE XI.) 



THE story of Dr. Gregoi'y's adventurous journey to Mount Kenya 

 and Lake Baringo, which the author has now placed before 

 the world in the admirable volume just published by Mr. Murray, 

 is not wholly unknown to many of us, for, on his return, he delivered 

 an excellent evening lecture before the British Association at Oxford 

 in August 1894, he also gave an account of his journey in a paper 

 to the Royal Geographical Society, so that we have already learned 

 from his own lips the main facts connected with that very plucky 

 and (fortunately for the world of science) successful expedition. 

 Anyone, however, who has a love of travel — whether he has heard 

 Dr. Gregory tell his story or not — will take up this volume with 

 interest, and will probably do, as we have done, read the book, 

 instead of writing a review of it ! For the story of British pluck 

 and endurance, the dogged determination to overcome obstacles, 

 however trying and apparently insuperable, always commends itself 

 to the Anglo-Saxon, and makes his heart beat with pleasure and 

 pride to claim such an one as a man and a brother. 



In addition to the narrative, which of course occupies a large 



