I wish to thank Christian Torrent for all those reviews and the time spent doing research.

We can see that within a month, Guys sang in Algiers Guillaume Tell, Les huguenots, La Juive, L'Africaine, Sigurd, Le trouvère, Hérodiade, and that in 1930 at the same theater, he was alternating Guillaume Tell and Les huguenots with O'Sullivan.
Happy times when Osborn would not have been allowed to sing the Fisherman, not even thinking about Arnold.