"Oh!" she said, with an intonation of surprised disappointment.

"Lish rub el Moyeh en Nil awadeh!" he said.

"What does that mean?"

"'Who drinks Nile water must return.'"

She smiled, lifted the cup again to her lips, and drank the last drop of water.

"Nile water! I understand."

"And now you will have some sherbet."

He spoke to Aïyoub in Arabic. Aïyoub took away the cup, brought a tall, delicate glass, and having thrown over his right arm an elaborately embroidered napkin, poured into it from a narrow vase of china a liquid the colour of which was a soft and velvety green.

"Is this really sherbet?" Mrs. Armine asked.

"Sherbet made of violets."