The papers catalogued here are especially rich in political material, 17th century-19th century, in estate and local affairs correspondence and papers, 16th century-20th century, in financial and legal material, 15th century-20th century, and in personal, household and estate accounts, 17th century-19th century. There is material concerning India in the correspondence and papers of the 8th, 9th and 10th Marquesses of Tweeddale, and concerning the Peninsular War in the correspondence and papers of the 8th Marquess.