SINGULAR CIRCUMSTANCE. — The ship Persian, Commander Hopkins, for Syndey, New South Wales, which encountered the hurricane on Tuesday, the 29th ult., in the Downs, and which induced the captain to cut away the masts, as the only means of saving the ship, cargo, and emigrants, has returned, and was hauled into the West India docks on Friday to undergo the necessary repairs. The following singular circumstance occurred on board the ship whilst lying in the Downs during the gale: — A few minutes before the commencement of the hurricane, a fine Newfoundland dog, which had been pursuing his gambols on the deck, suddenly commenced running furiously from one end of the ship to the other, foaming at the mouth, and exhibiting all the symptoms of hydrophobia, when some of the crew, becoming alarmed, betook themselves aloft for safety; the animal then descended below, where there were several passengers, ran through every part of the ship in the same violent manner, but, fortunately, without doing any injury. The captain, in the mean time, ordered the chief mate to follow the dog and destroy it. The animal again suddenly made its appearance on the deck, and, bounding towards the stern of the vessel, where a boat is usually attached, leaped into it, gazed for a moment, plunged into the foaming waves, and was seen no more.