The Miscellany of the Scottish History Society brings together critical editions of important and previously unpublished manuscripts of relevance to Scottish History. As well as providing transcriptions, the editors introduce and explain the context of documents which have been neglected or even unknown to historians, providing a valuable resource for researchers, students, and all those interested in exploring Scottish history through the original sources. Volume XV focuses on the turbulent middle decades of the seventeenth century, offering editions of three vital but previously unpublished manuscript sources for this period: the Letter-Book of John Clerk of Penicuik, 1644-1645; the Minute Book of The Board Of The Green Cloth, July 1650 - July 1651; and the Records of the Anglo-Scottish Union Negotiations, 1652-1653. With a particular emphasis on the economic and political history of the period, the records offer valuable insights on trade networks and commodities, and on the upheavals following in the wake of the execution of Charles I. They also help to place Scottish history in a wider British and European context, by highlighting mercantile networks and the negotiations for Anglo-Scottish Union under Oliver Cromwell. Together, they comprise an essential resource for those interested in seventeenth-century history.