Virtually All merchandise during the pamphlet selection have data in LocatorPlus. The many pre-1801 and about 50,000 nineteenth and twentieth century pamphlets will not nonetheless have data in LocatorPlus. Lots of them are available by browsing within the Index-Catalogue in the Library in the Surgeon-General’s Workplace More than the hundreds https://maps.app.goo.gl/4RRJnUstxVnoZ5sQ8