Do both Simon Boccanegra and Le roi d'Ys have the same number of acts?
Le roi d'Ys Le roi d'Ys ("The King of Ys") is an opera in three acts and five tableaux by the French composer Édouard Lalo, to a libretto by Édouard Blau, based on the old Breton legend of the drowned city of Ys. That city was, according to the legend, the capital of the kingdom of Cornouaille.
Mrs. Jarramie's Genie Mrs. Jarramie's Genie is a one-act comic opera with a libretto by Frank Desprez and music by Alfred Cellier and François Cellier. The piece was first presented at the Savoy Theatre on 14 February 1888, as a curtain raiser to the revival of "H.M.S. Pinafore" (November 1887 – March 1888). It was subsequently presented as a curtain raiser to revivals of "The Pirates of Penzance" (March – June 1888) and "The Mikado" (June – September 1888), and then with "The Yeomen of the Guard" (October 1888 – November 1889).