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. 



