These items are different in nature to rest of the Hardwick Manuscripts, firstly in that they are largely papers, such as settlements and letters patent, whilst most of the items in this collection are manuscript volumes. These records probably more closely resemble the Hardwick Drawers collection which contains largely indentures and deeds. However the indentures in this series were clearly identified at some point in their history as all specifically relating to family members and the establishment of the Cavendish inheritance, rather than related to tenants, neighbours or the estates more generally.
The muniment register is the item that links the Hardwick Drawers collection to this one, as it lists the places and locations of deeds that were in the Hardwick Drawers in the early 17th century.
This Additional Hardwick Manuscripts series also contains inventories, which are also present in HMS/2 and are records which were created as another way for Cavendish family members to keep record of their property. The settlements here also relate to many of the copies written into HMS/2/15.
HMS/5/3 and HMS/5/1, both purchased for the 11th Duke of Devonshire, are an financial account book of William St Loe and an Inventory of Sir William Cavendish's house at Northaw.