MSS.6406, 6408-6409 were bound in the nineteenth century and certain anomalies occur. For instance, MS.6408 has a large section of deeds. One item of interest is the way the Halketts are connected with the Argyll family in different ways in the seventeenth century. The Marquess of Argyll was friendly with Sir James Halkett, and MS.6408 concludes with twenty-five letters from the Marquess, some of which touch on the Civil War (numbers 81-85). MS.6406 contains a number of letters (numbers 139-152) concerning Sir Charles Halkett, Baronet (created 1671), as commander of the Fife and Kinross Militia during the Argyll Rebellion of 1685. Coal was one of the main economic interests of the Halkett family, and MS.6407 contains some early letters on this subject.