The _Mehmandar_, who was announced in these dispatches, was MAHOMED ZEKY KHAN, (the chief of the _Noory_ tribe, one of the new modeled corps) a great favourite at the Court of _Teheran_, and with the Prince of _Shiraz_, and advanced lately by the King to the dignity of _Khan_. It was added also, that his appointments were more magnificent than any which had ever before been annexed to the _Mehmandar_ of an English Envoy; and, as a further proof of the estimation in which His Majesty’s mission was held, JAFFER ALI stated, that the Prince had prepared for him, as our acting Agent at _Shiraz_, a rich dress of honour, which, however, he had found means to decline from a fear of the jealousy which it might have excited against him. But the Prince, resolved on bestowing upon him some distinguishing mark of his favour, had given him a shawl, which belonged to one of his own head-dresses, and a young and promising Arab horse, which had been sent as a present to himself by the Governor of _Chabi_. So well indeed had JAFFER ALI deserved the confidence of both the negociating parties, that Sir HARFORD JONES, now at the close of these preliminary arrangements, sent him a patent constituting him the Agent for the British affairs at the Court of _Shiraz_. It will be recollected that the _Nereide_, the _Sapphire_, and the _Sylph_, sailed with the mission from _Bombay_ on the 12th of September. The _Nereide_ arrived first; the _Sapphire_ also reached _Bushire_ about sun-set on the 18th October. The Arab ships too, that we passed off Cape _Verdistan_, had come in about noon on the same day, and had continued firing their guns at distant intervals till the evening: but the _Sylph_, on board which were the Persian Secretary and some of the presents, was yet missing; nor indeed had we seen her, since the second day after that on which we had left together the harbour of _Bombay_. On the 29th Oct. arrived the _Nautilus_, H. C. cruizer, which had sailed from the same port on the 22d Sept. Though she had neither seen or heard directly any thing of the _Sylph_, yet the circumstances of her own passage prepared us to anticipate the worst. The _Nautilus_ had been attacked off the large _Tomb_, in the Gulph of Persia, by the _Joasmee_ pirates; three only were at first in sight, but on the signal of a gun, a fourth appeared, and together they bore down, two on the quarters and two on the bows of the _Nautilus_; they were full of men, perhaps six hundred in the four vessels, all armed with swords and spears, and, as they shouted their religious invocations, they shook their weapons at the ship. When the engagement became closer, they maintained a fire of twenty-five minutes, and one of their shot killed the boatswain of the _Nautilus_. Of these pirates an interesting account was published in India by Mr. LOANE, who was taken prisoner by them. It is unnecessary, therefore, to add more on the subject than that their chief resort is at _Roselkeim_,