KINGSDOWNE, KENT.—On the morning of the 18th September, signals of distress were fired by a vessel which proved to bo the steamer Dolphin, of London, bound from London to Havre, with a general cargo and passengers, which had been in collision with another steamer, during a N.E. wind, thick weather, with rain and a heavy cross sea. Two large galleys from Eingsdowne went off in reply to the signals, and brought ashore two of the steamer's boats, containing twenty-four persons. It was reported that the vessel had sunk between Walmer and Kingsdowne, and that there were several other people left in the rigging. The Kingsdowne Life-boat was therefore launched at 3.30, and rescued six persons, who were brought safely ashore, one of them, a passenger, being in a most exhausted condition. The galleys also went out again, and a diligent search was made for any other survivors, but none were found..