 Drexler followed up with two open letters to Smalley in April and July 2003. The April letter began, "I have written this open letter to correct your public misrepresentation of my work." Drexler accused Smalley of continuing to dismiss his work by publicly describing molecular assemblers as requiring what Drexler now calls "Smalley fingers", which he stated to be unlike the enzyme-like systems he had actually proposed. He asserted:
