Correspondence (c 300 letters); account books; household expenses and receipts; railway map and prospectuses; diary and pocket books; maps of the estate; plans and drawings for Park of Drumquhassle; family tree; marriage contract and other legal documents; file of correspondence and documents concerning the Baltimore Govanes; valuation roll; album of poems and sketches; books; miscellaneous items.

The collection appears to comprise legal, estate and financial records of the Leith Buchanan Family and their antecedents. The documents, mainly from the 18th and 19th centuries, relate to land and property in the area around Drymen. Although most refer to title deeds and the purchase or transfer of property, some documents list rents paid and crops grown on the family estates, and a few list the debts owed by individuals, perhaps at the time of their death.