Here we took pilot and made sail up the river. Soon we were land-locked and could make no progress. All hands were called to bend a fore-top-sail, and while bending it, the pilot spoke, saying, "we are in the Killserphine!" the captain replied that "it was not the season for it to break." This was no sooner said, than a noise was heard like distant thunder, which caused all hands to look for its cause, when to our surprise we saw a heavy sea rolling half mast high, and coming directly towards us. The captain in agony of mind exclaimed, "My God! we are all lost!" The sea struck us, washing one of the men from the wheel, and filling the decks with water, but doing no damage save carrying away the carved work on the stern and the starboard quarter boat. This was followed by one of less magnitude scarcely washing the deck. The third one beat lightly against the stern. This occasioned much surprise among the crew, for many of them knew not what it meant, having never before heard of such a place. Upon inquiry respecting it, I was informed by an Irishman, over whose head 90 winters, which he recollects, have passed, that once there was an island in the Shannon on which was a castle and other buildings, and that by the workings of nature that island gradually sunk away, until it disappeared entirely, and now each year the soundings are found to vary, there yet being a gradual sinking of the river's bottom. The water is now 11 or 12 fathoms deep. [231] During each year, (it is said by those upon whom reliance can be placed) there are three swells or rollings of the sea, the same as those above described, and at no stated or regular times, often taking the mariner by surprise. This to the incredulous may seem to be unworthy of credit; but I have the testimony of hundreds to the truth of the same. The cause of this phenomenon I shall not attempt to state. We came to anchor about the middle of April, 1839. Seven of us were sent to the hospital, where I remained fourteen days, when getting my discharge, I went to a boarding-house where I remained only a few days, and then shipped on board the brig Bryanabbs of Limerick, Capt. Gorman, (a brother of the captain of the Borneo) bound for London, with wheat in bulk for cargo. We reached London the middle of May. There I remained but a short time, having a berth offered me on board the Bengal, Capt. Wright, bound for Alexandria. Getting before a fair wind we were soon in the Bay of Biscay, where we encountered a short though very severe gale of wind. Nothing occurred more than is usual in all gales. After the wind abated we again made sail and stood for Gibralter, where we touched for the purpose of getting some recruits, such as hogs, fowls, &c.