Virtually all items in the pamphlet assortment have information in LocatorPlus. All of the pre-1801 and about 50,000 19th and 20th century pamphlets will not nevertheless have documents in LocatorPlus. Many of them are available by seeking within the Index-Catalogue on the Library in the Surgeon-Basic’s Office Above the centuries, https://maps.app.goo.gl/4RRJnUstxVnoZ5sQ8