Franz Gehring, A Dictionary of Music and Musicians (1900)
“ We are here brought face to face with the main distinction between Opera and Singspiel; the latter by no means excludes occasional recitative in place of the spoken dialogue, but the moment the music helps to develope the dramatic denoument we have to do with Opera, and not with Singspiel. It is worth noting that no other nation possesses a form identical with the German Singspiel ”
