MSS.6424-6453 are a reconstruction of loose numbered accounts kept by the factors. This series of accounts, as also in the case of the bound volumes (MSS.6454-6455), is arranged on the crop year system, generally estimated from Whitsunday to Whitsunday. Thus, Whitsunday 1705 to Whitsunday 1706 equals Crop 1705. Sometimes the crop year runs from one of the other Scottish Quarter Days, such as Lammas. This causes an overlap and consequently a crop year may be represented thinly or not at all as in the case of Crop 1727. In addition, some of the crop years are weak due to lack of material. The arrangement is not always chronological; for example, the factor might place together a bond of, say 1705, with the final discharge of that bond, say 1739. In such cases the last date, by which the items were placed, is given.

MSS.6424-6453 concern agriculture and general estate management, and also include detailed accounts of the annual costs of coal mining. MSS.6454-6455 relate only to agriculture and estate management.