The district commissioner at Embo told me that he had been ordered to reduce the number of rhinos in his district in the interest of public safety and that he had killed thirty-five in all.

Out of this number five charged him.

That would indicate that one rhino in seven will charge.
Captain Dickinson, in his book, _Big Game Shooting on the Equator_, tells of a rhino that charged him so viciously that he threw down his bedding roll and the rhino tossed it and trampled it with great emphasis, after which it triumphantly trotted away, elated probably in the thought that it had wiped out its enemy.

A number of fatalities are on record to prove that the rhino is a dangerous beast at times, and so I must conclude that the rhino experiences we had were exceedingly lucky ones, and perhaps exceptional ones in that respect.
In only one instance was it necessary for us to kill a rhino and even then it was done more in the interest of photography than of urgent necessity.

On our game licenses we were each allowed to kill two rhinos, and as I wanted, one of the Tana River variety it was arranged that I should try to get the first big one with good horns.