East Anglia has for long been one of the most important centres of pig production in Great Britain, and, if the county of Suffolk is taken by itself it had, in the period between the two wars, a higher concentration of pigs than any other. It is not, however, too easy to find a satisfactory historical account of the reasons which have led to this state of affairs, though some of the possible factors could be accounted for. In view of the extent to which the pig industry in different parts of the world has now become highly specialised one has to be careful to differentiate between factors affecting quality and quantity, for high quality is not the first historical factor.