Analysis of information sources in references of the Wikipedia article "The Phantom of the Opera (1925 film)" in English language version.
The Phantom of the Opera, which has been many months in the making, is to be presented this evening at the Astor Theatre. We have told of the great stage effects, of the production of a section of the Paris Opera, with the grand staircase, the amphitheater, the back-stage scene – shifting devices and cellars associated with the horrors of the Second Commune. ...
