150 A MANUAL OF MENDELISM 



his daughters come into profit when they are about 

 three years old and he is about five. Few sires reach 

 this age in Britain, and it is not a unique tragedy to 

 discover a farmer with ten or twelve high-grade young 

 cows and be told, on inquiring for their sire, that he 

 has already "gone to the butcher" or "gone to the 

 Argentine." 



