A number of ‘new’ letters and enclosures by or to John Locke have been discovered since the final volume of Esmond S. de Beer’s Correspondence of John Locke (CJL) appeared in 1989. The following article prints and describes three unpublished letters and enclosures of this type (§1), including seven other letters recently located or auctioned but otherwise transcribed by de Beer from derivative sources (§2). The article additionally describes three letters written by Locke in various official capacities (§3) and two unpublished, non-epistolary manuscripts (§4).