Handwriting and other details have been reported based on the notes of David Berger, Andrew Homzy, Dr. Theodore Hudson, Walter van de Leur, and Dr. Mark Tucker.
Nex is contained in one of one hundred fourteen folders for "Jump for joy" consisting of 2 parts in C Major concert, 4 parts in F Major concert, 4 parts in eb minor concert, and 1 part in Db Major concert -- in ink and pencil -- in unidentified hands (Sanders, Whaley?).
Parts in 4 groupings -- (i) Parts in C Major for 1 reed - baritone; trumpet. -- (ii) Parts in F Major for 1 reed - alto; trumpet; trombone; unidentified Bb transposing instrument. -- (iii) Parts in eb minor for 1 reed - Jimmy; 1 trumpet - 4; bass; drums. -- (iv) Part in Db Major for unidentified bass instrument (bass?). -- from the Duke Ellington Library.