ADVANCEMENT OF LEARNING 209 



and that the fellow never had a brother, the soldiers might have 

 murdered their leader ; but he acted the whole as a part upon 

 the stage. And thus much for the logical sciences. 



We now come to that portion of our treatise which we have 

 allotted to rational knowledge. Let no one, however, think 

 that we hold the received division of the sciences of small ac- 

 count, because we have wandered out of the beaten paths. In 

 so digressing we have been influenced by a twofold necessity- 

 First, to unite two methods, which both in their end and nature 

 are altogether different, viz., the ranging in the same class those 

 things which are naturally related to each other, and to throw 

 into one heap all those things which are likely to be called im- 

 mediately into use. Thus, as a secretary of a prince or of some 

 civil department ranges his papers according to their distinct 

 heads treaties, instructions, foreign and domestic letters 

 each occupying a separate corner of his study, and yet docs not 

 fail to collect in some particular cabinet those papers he is likely 

 to use together, so in this general cabinet of knowledge we have 

 selected our divisions according to the nature of things them- 

 selves; but if any particular science required to be treated at 

 length, we have followed those divisions which are most con- 

 formable to use and practice. The second necessity arose from 

 supplying the addenda to the sciences, and reducing them to an 

 entire body, which completely changed the old boundaries. 

 For, say that the existing arts are fifteen in number, and that 

 the deficiencies increase the number to twenty, as the parts of 

 fifteen are not the parts of twenty, two, four, and three being 

 prime numbers in each, it is plain that a new division was forced 

 upon us. 



