Wow!  This is truly an embarrassment of riches.  Proper has done it again.  It's all here:  the formative years of one of the greatest figures in the history of jazz -- back when he was (sometimes) known as "Baron" Mingus.  There are some real rare gems in this collection.  88 tracks on four discs, making for five hours of music; informative and engaging 52 page companion booklet including a  complete track by track discography -- all for one amazing price