The Slaves of the Padishah by Mór Jókai

It was three days since Azrael had come into the possession of Hassan Pasha, and in the evening of the third day Haji Baba was sitting in the prow of his ship and rejoicing in the beautiful moonlight when he saw, a long way off, in the direction of the Margaret island a skiff, and then another skiff, and then another, row across the Danube, and heard heartrending shrieks which only lasted for a short time.

Presently the skiffs disappeared among the trees on the river bank, the last hideous cry died away, and from the rose-groves of the castle came a romantic song which resounded over the Danube through the silent night. The merchant recognised the voice of the odalisque, and listened attentively to it for a long time, and it seemed to him as if through this song those shrieks were passing incessantly.