Free public domain sheet music from IMSLP / Petrucci Music Library
||Messe solennelle for solo quartet and chorus or solo quartet choir
||Revd. Henry Macdowall, Pastor of St. Agnes Church, New York.
||SATB soli, SATB chorus, and Orchestra
- Worldcat gives orchestral accompaniment, so this is actually a vocal score. (It is also possible however that it was originally written for piano or organ accompaniment... in which case the Schirmer 1881 is a full score of a work intended for piano/organ acc. in the first place, not a reduction... and orchestrated in 1913, which the Worldcat/library entries also suggest. Don't know- may be possible to find out...)