DEPARTURE FOR HOME.

Early in the month of September I mentioned, in a conversation with the naval superintendent, my intention to leave Gibraltar for England by the first homeward-bound steamer of the Peninsular and Oriental Company that arrived. He observed that the "St. Jean d'Acre," the flag-ship of Admiral Elliot, was to sail for Plymouth on the 8th or 9th, and that if I chose to go in her he would ask the Admiral to give me a passage. To this most friendly proposal I thankfully acceded, and received, through Captain Warden, an invitation from the Admiral, and an intimation that a cot should be slung up for me in his saloon. At the appointed time, I went on board, and met with a most gratifying reception from the Admiral and the other officers. I was apprised that the ship was to call at Tangier, and also at Cadiz, which might cause a delay of some hours at each place. We went very quickly to Tangier, where a communication was received for the British ambassador at Madrid, to be transmitted to him from Cadiz. On arriving off the latter place, the Admiral landed and came back in about an hour to have his personal luggage packed up, to put his sailing captain in full command of the vessel, and then to proceed himself to Madrid as speedily as possible, in accordance with a telegraphic message from our ambassador. All requisite arrangements were very quickly completed; but before he left the ship he addressed the officers and crew, expressing briefly but strongly his regret at parting from those who had evinced, whilst under his command, the greatest efficiency in the discharge of their duties, accompanied by numerous manifestations of respect and attachment, of which he felt extremely proud, and should never be forgetful. As soon as his barge pulled off, the crew, of their own accord, rapidly manned the yards, and cheered him most enthusiastically until he entered the port and was no longer in sight. It was a most affectionate farewell, and must have been thoroughly disinterested, for the ship was going home to be paid off, and, consequently, her officers and crew would be dispersed amongst the general body of the naval service. Immediately after we left Cadiz, the midshipmen came into the saloon to receive lessons from the naval instructor; and as each of them entered he saluted me with a semblance of the utmost respect and humility, as "Admiral Porter." When I disclaimed the rank and authority ascribed to me by the middies, one of them replied, that when the admiral had gone away, leaving me in full possession of his cabin, they had agreed to make me an admiral, at all events until we reached Plymouth; and he begged leave to suggest that the first exercise of my authority ought to be an order to the instructor to give them a holiday or two. I laughed heartily at the young scamp's suggestion, and the lessons commenced. The instructor reprimanded one of his pupils for not having previously studied some pages assigned to him to learn, saying, "You will never attain rank in the navy if you continue so ignorant of Navigation," The middy replied, pointing to me, "The admiral who is sitting there is of very high rank, and I could safely swear that I know as much about navigation as he does."