Between whiles

Who buys? Who buys? 'Tis like a market-fair; The hubbub rises deafening on the air: The children spend their honest money there; The knaves prowl out like foxes from a lair. Who buys? Who sells? Alas, and still alas! The children sell their diamond stones for glass; The knaves their worthless stones for diamonds pass. He laughs who buys; he laughs who sells. Alas!