"Good dervish," answered Prince Perviz, "I know whom you speak of; he was my elder brother, and I am informed of the certainty of his death, but know not the cause." "I can tell you," replied the dervish; "he was changed into a black stone, as all I speak of have been; and you must expect the same transformation, unless you observe more exactly than he has done the advice I gave him, in case you persist in your resolution, which I once more entreat you to renounce."