 Her correspondence with Jean Le Clerc gives some insight into her views on religious toleration. It also includes her defence of her father’s True Intellectual System of the Universe against the critique of Cudworth by Pierre Bayle, a controversy which was conducted by proxy through Jean Le Clerc. This is revealing in a number of ways. It shows she was willing to disagree with Cudworth (e.g., on the question of whether there could be such a thing as unextended substance), whilst retaining her respect for him and being prepared to defend him against his detractors (in this case Pierre Bayle). It also indicates that she had not abandoned all the Platonist tenets to which she subscribed before she met Locke.