The majority of the Cockburn Family land papers relates to Cockburn family land holdings, land dealings and surveys, and includes correspondence, field books, hand-drawn maps, indentures, and receipts. Most of the land papers were generated by the family's work as surveyors throughout eastern New York State, including the Catskill and Adirondack Mountain regions, and parts of Vermont. Some papers relate to land owned by the family in Ulster and Greene Counties and areas of what is now Vermont. Occasionally, records produced by survey work done at an earlier time, by other surveyors, have been included with Cockburn records. The papers also include family correspondence, legal and financial records, and writing.