 Damaris Masham’s correspondence is important for the insight it gives into her philosophical interests. It is not a perfect source, as it is far from complete. She herself preferred what she called “rationall conversation” as a medium for philosophical discussion. After Locke’s arrival at Oates, she was able to engage in person with visitors from Locke’s otherwise male social world of friends and associates, such as his nephew Peter King, Anthony Collins, John Shute (later Viscount Barrington), Francis Mercury van Helmont, Samuel Bolde, Lord Shaftesbury, Lord Peterborough and Isaac Newton. Among these, Pierre Coste was engaged as tutor to her son.  Prior to this, letter-writing enabled her to engage with others beyond her domestic environment. Letters also mitigated her isolation from company at Oates after her marriage. Subsequently, the review of her Discourse in Jean Le Clerc’s Bibliotheque Choisie, was confirmation that she acquired a place of sorts in the international intellectual network known as the ‘Republic of Letters’, which was centred on Huguenot diaspora in the Netherlands. Her international correspondents from this network besides Jean Le Clerc included Philip van Limborch and Gottfried Wilhelm Leibniz.