b. 8 Apr 1933, NY, USA. In the 50s Jeffrey experienced worked through the entire USA with R&B/blues performers including Wynonie Harris, Big Maybelle and B.B. Ruler before time for New York to review music at Ithaca University. Jeffrey caused Illinois Jacquet, Sadik Hakim and Howard McGhee before touring European countries in 1968 with Dizzy Gillespie. In the 70s, after a short spell using the Count number Basie Orchestra, Jeffrey done and off with Thelonious Monk aswell as performing a concert of his music in the Newport Jazz Event in 1974. Later on he organized and carried out Charles Mingus’ music on his last albums. Jeffrey in addition has been mind of Jazz Research at Rutgers University or college because the early 80s.