Books, maps, periodicals, cartoons, manuscripts, prints, and pamphlets from the former reference library of the Chief Secretary’s Office in Dublin Castle, Ireland. These materials, from the late 16th to the early 20th century, relate mainly to the political administration of Ireland, with correspondence from George Townshend, Lord Lieutenant of Ireland from 1767 to 1772, as well as Sir William Petty, Vincent Gookin, and Myles Symner, regarding their survey work in Ireland.