“Not she!”

“Did she see him?”

“Of course she did! As if a woman's eyes couldn't see through straw-plait!”

Barto paused, calculatingly, eye on victim.

“The Signorina Vittoria,” he resumed, “has engaged to sing on the night of the Fifteenth; has she?”

A twitching of Luigi's muscles showed that he apprehended a necessary straining of his invention on another tack.

“On the night of the Fifteenth, Signor Barto Rizzo? That's the night of her first appearance. Oh, yes!”

“To sing a particular song?”

“Lots of them! ay-aie!”

Barto took him by the shoulder and pressed him into his seat till he howled, saying, “Now, there's a slate and a pencil. Expect me at the end of two hours, this time. Next time it will be four: then eight, then sixteen. Find out how many hours that will be at the sixteenth examination.”