The Caliph, who had for a long time past desired to confer a favour upon his Grand Vizier, sent his black slave to bring up the merchant. The slave soon returned with him. The merchant was a short stout man, with a dark brown face, and in ragged attire. He carried a chest, in which he had various kinds of wares, pearls and rings, richly inlaid pistols, goblets and combs. The Caliph and his Vizier looked at them, and the former purchased some beautiful pistols for himself and Manzor. As the merchant was about to pack up his chest the Caliph saw a small drawer, and asked what it contained. The merchant drew out the drawer, and showed therein a box filled with blackish powder and a paper with strange writing upon it, which neither the Caliph nor Manzor could read. "I received these things from a merchant who found them in the streets of Mecca," said he. "I know not what they contain. They are at your service for a trifling price, for I can do nothing with them." The Caliph, who was a great collector of old manuscripts for his library, even if he could not read them, purchased box and writings, and dismissed the merchant. But it occurred to the Caliph that he would like to know the meaning of the writing, and he asked the Vizier whether he knew anyone who could read it. "Most worthy lord and master," replied the Vizier, "near the great Mosque there dwells a man who understands all languages; he is called 'Selim the Wise.' Send for him; perhaps he may be able to interpret the writing." The learned Selim was soon brought. "Selim," said the Caliph, "they say thou art very learned; peep now into this writing, and see if thou canst read it. If thou canst, thou shalt have a rich new garment; if thou canst not, thou shalt be beaten with five-and-twenty strokes upon the soles of thy feet, for in that case thou art without the right to be called 'Selim the Wise.'" Selim bowed himself and said: "Thy will be done, my lord." For a long time he examined the writing, then suddenly exclaimed, "This is Latin, my lord." "Say what it means," commanded the Caliph, "if it be Latin." Selim commenced to translate the documents. "Oh man, thou who findest this, praise Allah for His great goodness to thee. Whoever snuffs of the powder contained in this box, and says thereupon 'Mutabor,' will have the power to change himself into any animal he may choose, and will be able to understand the language of that animal and all others. Should he wish to return to his human form he must bow himself three times to the East, and in the direction of our holy Mecca, and repeat the same word. But beware, when thou art transformed that thou laughest not, otherwise the magic word will disappear completely from thy memory and thou wilt remain a beast."