John Medaille asked: "Do I take it then that we have reached agreement   
at least on the third point, that Ricardo assumed that capital is   
confined to national boundaries?"  
  
No, Ricardo did not assume that capitals are always confined to national   
boundaries.  On the possibility of capital mobility between countries   
and its determinants in Ricardo's analyses, see e.g., Works 1: 136-7,   
247-8, 2:452, and 3: 274.  
  
James Ahiakpor