Gustav Holst's The Wandering Scholar is a one-act chamber opera for STBarB and Orchestra, edited by Benjamin Britten and Imogen Holst. 
The Wandering Scholar, Holst's last opera, was written in 1929-30 and was first performed in The David Lewis Theatre, Liverpool, in 1934, conducted by Dr. J. E. Wallace and produced by Frederick Wilkinson. This was a few months before Holst's death, and he was too ill to go to the performance. He had no chance to revise the score, which remained unpublished until this edition. 
This is the vocal score for soloists with piano reduction.