Sir: 
 
     If economics has no definition, we may still practice it, in an 
unselfconscious way.  If one wants to reflect on Economics, and the 
History of Economics does, then some idea of the subject of reflection 
is necessary, however fuzzy it may be.  Selfconsciousness is of the 
essence of the History of Economics.  How can one ramble through 
Sociology, Political Science, etc., without some way of distinguishing 
those disciplines from Economics?