xii PREFACE TO FIRST EDITION 



not recorded here. Some that I give now are fine measure- 

 ments, some are only ordinary statistics, many are of new 

 species altogether ; these last being mainly a result of the 

 quite recent opening up of Africa. The advice noted as to the 

 way to measure must be dealt with strictly, for many persons 

 measuring by different methods produce untrustworthy record. 

 We have tried to be fair in producing the statistics, taking them 

 rather under than over the mark ; and the tape has not been 

 pressed into corrugations of horns, but carried outside, over all 

 inequalities. 



R. W. 



