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GAME AND DISEASE 
have been elevated several thousand feet, for it is more probable 
that (like other volcanoes) it owes its present altitude (14,200 ft.) 
merely to the long-continued accumulation of its lavas and 
tuffs. Evidence of downward sagging of the surrounding 
strata is indeed likely to be forthcoming, and a local analogous 
instance of such sagging is furnished a little farther south by 
the northerly tilting of the Miocene beds in the Karungu 
district towards the centre of the volcanic mass of Gwasi 
(6384 ft.), owing to the enormous weight of its successive 
lava-flows and tuffs, which are revealed so graphically in the 
lofty cliff-sections between the mouth of the Kavirondo Gulf 
and Karungu. 
The fact that the caves of Mount Elgon occur at varying 
altitudes, and not at the same level, would seem also to militate 
against their having been excavated by wave- action of the 
Victoria Nyanza ; and I should feel inclined to ascribe the 
formation of these caves rather to springs arising from water 
percolating through the friable tuffs in which the caves occur, 
and issuing at the junction with an underlying impervious 
flow of lava. It is noteworthy that Mr. Hobley mentions 
the dripping of a spring from the roof of one of the Elgon 
caves, and he also states that in the case of the caves of the 
Nandi Escarpment small streams still occur in some of them. 
It seems to me, therefore, not unreasonable to suppose that 
both the Elgon and Nandi caves may owe their origin to the 
erosion of underground water at a period when the annual 
rainfall was heavier than at the present day and before the 
progressive desiccation had set in to which Mr. Hobley has 
called attention in the pages of this Journal (No. 9, p. 4). 
GAME AND DISEASE 
By A. Blayney Percival 
When talking from personal observation of disease amongst 
game, one must of necessity be vague : for it is at the best 
but conjecture. One cannot, as with domestic stock, use a 
