20th Century (ca 1971). For 7, 8 or 9 trombones in one choir. Parts 6 & 7 (tenor trombone) are optional. This work appears to have originally been an septet or octet dating from the early 1970's (1971 to 1975). In this edition, the top four tenor parts are all in tenor clef. The two optional tenor parts 6 and 7 parrot the bass trombone parts at the octave.