The vast majority of objects while in the pamphlet assortment have information in LocatorPlus. All of the pre-1801 and about 50,000 19th and twentieth century pamphlets will not still have data in LocatorPlus. A lot of them can be found by looking in the Index-Catalogue from the Library of the https://maps.app.goo.gl/4RRJnUstxVnoZ5sQ8