In his Three by.... series Stephen Morland has compiled and edited favourite themes in an interesting and challenging way. These flute quartets, in this case Bachs Sleepers Wake, Jesu Joy and Sheep May Safely Graze, have been delightfully arranged in such a manner that students of varying ability can have a rewarding and enjoyable musical experience. For schools, studios and professionals.. Scoring: Parts & Score. Duration: 7 min 30 sec. Performance Level: 5.