In 1977 c. 2,000 books were transferred to the Library from Saltoun Manse and became a long-term deposit in 1986. The collection originated in 1657, when Norman Leslie, minister of Gordon, Berwickshire, bequeathed 139 books for the use of the minister of Saltoun, East Lothian. From 1665 to 1669 Gilbert Burnet (1643-1715), the historian and Bishop of Salisbury, was minister there, and on relinquishing the post he added 10 books to the library. Burnet also left a trust fund, which, after his death, was partly used for the maintenance of the Manse library. Saltoun is probably best known for its association with the Fletcher family who acquired the estate in 1643 - in particular with Andrew Fletcher (1653-1716), the ıPatriotı, and his namesake (1692-1766), who became the distinguished judge Lord Milton - and books with their inscriptions are included in the library. The holdings of the library cover biography, history, literature, theology, topography and travel. There are 467 printed volumes from before 1821, and the collection is particularly strong in the amount of contemporary material by and about Bishop Burnet, as well as manuscripts recording the growth of the Library.
Typescript inventory of the manuscripts (Acc.9270). ıExtracts from the Acts and Proceedings of the Presbytery of Haddington, relating to Dr Gilbert Burnet, and the Library of the Kirk of Salton, 1664-1669', The Bannatyne Miscellany, 3, Edinburgh: Bannatyne Club, 1855, 389-402. W. Forbes Gray, ıAn East Lothian Library: Literary Treasures in the Manse of Saltounı, Life & Work, n.s. 1 (1930), 247-250.