Charles W. Calhoun, a history professor and author, has used the Library's collections for more than half a century in his work on studying late 19th century America.
It started, the story goes, with a back-to-school jam in the Bronx in 1973. There, in a basement rec room, DJ Kool Herc — aka Clive Campbell — stood between two turntables, switching between records to extend the instrumental breaks so his sister’s friends could dance longer. His parties became so popular he had to …