This fonds consists primarily of family correspondence and legal records. It includes correspondence between Harry Crookshank of Stromness, Orkney and Andrew Crookshank, 1808-1810, correspondence of Robert William Crookshank senior, 1819-1861, and correspondence of Robert W. Crookshank, Jr., 1841-1900. There are also deeds, leases, mortgages and other documents of Crookshank family, 1786-1891, and genealogical information about the Crookshank and Thomson families.