Free public domain sheet music from IMSLP / Petrucci Music Library
I noticed three things in your contribution to Haec_est_Regina_virginum,_HWV_235_(Handel,_George_Frideric):
- there is no lilypond source -- at least I would find that useful. Did you consider cross-contributing your work to Mutopia?
- you forgot to pass -dpoint-and-click=#f to Lilypond when generating the PDF. This results in an unnecessarily large PDF
- The key signature differs between the vocal and piano part.