This is the twenty-first volume in the Clarendon Edition of the Works of John Locke. The series aims to provide authoritative critical editions of all the writings of one of the most important intellectuals in the early-modern Anglophone world. The present volume completes the Correspondence edited by the late E. S. de Beer, published between 1976 and 1989. It contains some 300 documents: newly discovered or augmented, or newly collected, letters by or toLocke, or between his close associates.