While the two friends were sitting at the piano, and Ticellini marked several songs and duets, a knock was heard.

"No one can enter," said Salvani, springing up; "we wish to be alone."

"Oh, how polite!" exclaimed a clear, bright voice, and as Salvani and Ticellini looked up in surprise they uttered a cry of astonishment:

"Luciola!"

La Luciola was very beautiful. She was slim and tall, about twenty-seven years of age, with beautiful black hair and finely-formed features. Her almond-shaped eyes were likewise dark, but had a phosphorescent gleam, which gave her the name of Luciola, or the fire-fly. She was dressed in a red satin dress, and wore a jaunty black felt hat. There was quite a romantic legend connected with the pretty girl: no one knew from what country she came, since she spoke all the European tongues with equal facility, and steadfastly refused to say a word about the land of her birth. She possessed the elegance of a Parisian, the grace of a Creole, and the vivacity of an Italian. Her real name was unknown. She was called the heroine of several romantic adventures, though no one could say which one of her numerous admirers she preferred. La Luciola appeared to have no heart.

Very often La Luciola, dressed in men's clothes, would cross the Neapolitan plains, accompanied by her only friend, a tender, tall blonde. The latter was just as modest as La Luciola was audacious, and she clung to the proud Amazon like the ivy to the oak.

A few days before her departure from Naples, a Croatian officer had insulted her, and instead of asking a gentleman of her acquaintance to revenge the coarse remark, she herself sought the ruffian, dressed in men's clothes, and boxed his ears as he sat in a café. Amid the laughter of his comrades the officer left the café, and La Luciola triumphed.

Such was the person upon whom the fate of the new opera depended, for she reigned supreme at the Scala, and Salvani as well as Ticellini knew this.

While they were both meditating how to secure the Luciola in the easiest way, the songstress said:

"My visit seems to be unwelcome to the gentlemen?"