This document discusses the origins and development of blues and jazz music in America. It mentions several influential early blues artists like Charley Patton, Son House, and Robert Johnson who helped establish the blues in the early 20th century. Later influential blues artists mentioned include Riley B. King, also known as B.B. King, who helped popularize blues in the 1950s and 1960s. The document also briefly references the fiddle and curved banjo as instruments sometimes used in early blues music.