INTRODUCTION 



" I "HAT the reader of a book, of whatever 

 class, has a right to expect the writer 

 to understand his subject, is an axiom few 

 will be found to dispute ; but unfortunately 

 it is also one frequently more honoured in 

 the breach than the observance. Only the 

 other day I was reading a book in which a 

 writer on mountain sport attributed a miss 

 to his bullet having gone low, it being, 

 according to him, a well-known rule that 

 in firing at an animal from above, extra 

 elevation must be given to the rifle. These 

 few words proved to me his total ignorance 



