Private letters are amongst the most valuable, but also least well preserved sources for the historian. Dealing with events of the moment rather than of legal consequence, there was little reason to safeguard documents whose very ephemerality was shown by the medium on which they were written (paper) and their language (English). The survival of some notable collections of fifteenth-century letters, Paston, Plumpton, Cely, Stonor, and from the 1530s, the Lisle letters, should not disguise the fact that sixteenth-century letters between individuals (as opposed to letters between central government and its local lieutenants, and vice versa) are found relatively infrequently