ZEBRAS AND WILD DOGS 
493 
game for the dogs. I saw a zebra, in a herd, run toward some 
wild-dogs, with its mouth open and ears back; and they got out 
of the way, although seemingly not much frightened. Loring saw 
a solitary zebra seemingly unmoved by the close neighbourhood of 
some wild-dogs. 
Once, on the Nile, while Loring and I were watching a monitor 
stealing crocodiles’ eggs, we noticed a hippo in mid-stream. It 
was about ten in the morning. The hippo appeared regularly, at 
two or three minute intervals, always in the same place, breathed, 
and immediately sank. This continued for an hour. We could 
not make out what he was doing. It seemed unlikely that he 
could be feeding; and the current was too swift to allow him to 
rest; all other hippos at that time were for the most part lying in 
the shallows or were back among the papyrus beds. 
