In 1621, Peter Paul Rubens (1577-1640) wrote a letter to William Trumbull, the English diplomat and political agent to King James I, in which he described a large painting of a lion hunt that he had just completed: 'As you rightly observe, such things have more grace and power in a large picture than in a small one because the large size of a picture gives one much more courage to express one's ideas clearly and realistically'. Rubens here casually disclosed what lay at the heart of his artistic intentions - his constant quest to achieve in his compositions the equilibrium between power and grace. The same can be said of Anthony van Dyck (1599-1641) and Jacob Jordaens (1593-1678), whose lives and careers were markedly intertwined with and infl uenced by the senior artist. Just how diff erently they went about achieving this eff ect can best be seen in their drawings, for it is there that we see the artists thinking, evolving, and creating.