Calendars provide summaries full enough, for most purposes, to replace the original documents. These summaries are printed in chronological order and do not necessarily reflect the archival ordering of the documents (hence ‘calendar’). They are the primary finding aid for the records that they describe. This series details the papers of the Cecil family, specifically William Cecil, 1st Baron Burghley (1520/1-98) and his son Robert, 1st earl of Salisbury (1563-1612).