 On the title page of the first edition of his An Inquiry into the Original of Our Ideas of Beauty and Virtue (1725), Francis Hutcheson acknowledges a deep debt to Shaftesbury, announcing that “The Principles of the late Earl of Shaftsbury” would be explained and defended therein. But it is open to question whether Hutcheson overstates his debt. The debt is deepest with regard to the notion of internal sense, but Hutcheson can fairly be said to make this notion his own. That is certainly the judgment of history: anyone undertaking to explain, defend, or refute the notion of internal sense after 1725 took himself to be explaining, defending, or refuting the principles of Dr. Hutcheson.