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 effect, the necessary orders to their naval Commanders in the Mediterranean. Their said Majesties further engage that the naval Commanders of their squadrons shall, according to the means at their command, afford, in the name of the Alliance, all the support and assistance in their power to those subjects of the Sultan who may manifest their fidelity and allegiance to their Sovereign.

Art. 3. If Mehemet Ali, after having refused to submit to the conditions of the arrangement above mentioned, should direct his land or sea forces against Constantinople, the High Contracting Parties, upon the express demand of the Sultan, addressed to their Representatives at Constantinople, agree, in such case, to comply with the request of that Sovereign, and to provide for the defence of his throne by means of a co-operation agreed upon by mutual consent, for the purpose of placing the two Straits of the Bosphorus and Dardanelles, as well as the capital of the Ottoman Empire, in security against all aggression.

It is further agreed that the forces which, in virtue of such concert may be sent as aforesaid, shall there remain so employed as long as their presence shall be required by the Sultan ; and when His Highness shall deem their presence no longer necessary, the said forces shall simultaneously withdraw, and shall return to the Black Sea and to the Mediterranean, respectively.

Art. 4. It is, however, expressly understood that the co-operation mentioned in the preceding Article, and destined to place the Straits of the Dardanelles and of the Bosphorus, and the Ottoman capital, under the temporary safeguard of the High Contracting Parties against all aggression of Mehemet Ali, shall be considered only as a measure of exception adopted at the express demand of the Sultan, and solely for his defence in the single case above-mentioned ; but it is agreed, that such measure shall not derogate in any degree from the ancient rule of the Ottoman Empire, in virtue of which it has in all times been prohibited for ships of war of foreign Powers to enter the Straits of the Dardanelles and of the Bosphorus. And the Sultan, on the one hand, hereby declares that excepting the contingency above-mentioned, it is his firm resolution to maintain in future this principle invariably established as the ancient rule of his Empire, and as long as the Porte is at peace, to admit no foreign ship of war into the Straits of the Bosphorus and of the Dardanelles; on the other hand, their Majesties the Queen of the United Kingdom of Great