Narrative of the Voyages and Services of the Nemesis from 1840 to 1843. Bernard William Dallas
were admitted on board, and seemed delighted to gaze on something new.
As it was desirable that as much coal as possible should be taken on board before the vessel was compelled to haul off, owing to the falling of the tide, no time was lost in commencing the troublesome process. Even this did not at all deter the visiters, who continued to succeed each other in crowds, in spite of the inconvenience they suffered.
Several repairs were now to be made with all expedition. The drop, or false rudder, was first to be restored, and required to be much strengthened. This was a very essential matter; and a suggestion now occurred worth noticing, namely, that in the event of other vessels of the same description being sent to sea, they should be provided with some means of being able completely to choke the rudder temporarily, or prevent its action altogether, while at sea, in case of its being found requisite to repair the drop-rudder. The want of some means of keeping the rudder stationary while repairing it at sea was frequently felt, and something might easily be provided to effect this object. The whole delay at the Cape amounted to nine clear days.
On the 11th of July, all being completed, she once more stood out of Table Bay, with the cheers and hearty good wishes of all for her success, although they wondered what her mysterious destination could be.
It is evident that a steamer bound to Singapore, or to any place still further eastward, would have a choice of three routes; either she might make her passage from the Cape towards the Straits of Sunda, between the islands of Java and Sumatra, trusting principally to her sails, the winds being generally strong in those latitudes, and thereby saving her fuel; or she might run from the Cape up to the Mauritius, to take in coal, which has been done by many steamers, and thence proceed by the Straits of Malacca; or, lastly, she might run through the Mozambique Channel, between the continent of Africa and the island of Madagascar, and, touching at Ceylon for coals, proceed likewise down the Straits of Malacca to her destination.
On the present occasion, the Nemesis had distinct orders to choose the latter route, the season of the year being considered the most favourable for it, and it being thought desirable that a visit should be paid to the island of Johanna, the most frequented of the group called the Comoro Islands, situated at the northern end of the Mozambique Channel. This island will be more particularly alluded to in its proper place. Thence she was to proceed direct to Ceylon for coals. But even this was only known to her commander; and all that either officers or men could learn about her destination, when they left the Cape, was, that they were at once to proceed through the Mozambique Channel, but with what object they knew not.
The Nemesis now approaches to one of the most eventful periods of her history. Six days had scarcely passed since her departure from the Cape, when a new and quite unforeseen danger awaited her, and threatened the most appalling consequences, without any port being at hand for refuge. It has very rarely happened that a ship has been so near destruction, and yet escaped at last. The first few days of her passage alternated between gales and calms, and the high sea which she encountered only gave her a further opportunity of proving the good qualities which she possessed as a sea-boat. Cape Francis, on the southern side of the coast of Africa, within the colony, near Algoa Bay, was in sight from the mast-head on the 14th. The barometer began to fall on the 15th, and at length, on the following day, had almost sunk to twenty-eight inches. Vivid flashes of lightning now ran along the sky to the westward; the wind, which had been strong and steady from the N.N.W., freshened to a heavy gale; every appearance threatened an increase rather than a diminution of the storm; and the sea became so high and heavy, that it threatened every moment to overwhelm the long, low Nemesis, for the sail that could be put upon her scarcely sufficed to keep her before the sea.
The float-boards had been taken off the wheels before the gale commenced, and she had continued under canvas ever since. Algoa Bay had been passed long before the weather had become so threatening; to return to it was now impossible; the gale went on increasing, the sea rose fearfully, and the ship's course was slightly altered, so as to carry her further away from the land. Her danger even at this time was great, as she lay so low upon the sea, which heaved its convulsive waves high above her.
In the night, or rather about three o'clock in the morning of the 17th, a tremendous sea at length struck her upon the larboard quarter. Her whole frame quivered with the blow; and so violent was the shock, that the first impression of all on board was, that the ship had been actually riven asunder. The violence of the blow made her broach to the sea and wind; but, happily, she was got before it again as speedily as possible.
As daylight dawned, the injuries which the vessel had received were soon discovered. The starboard paddle-wheel had been seriously damaged; in fact, a considerable portion of it had been nearly carried away, and only hung by a very small attachment, by which it was then dragging through the water.
Scarcely had the necessary means been adopted to save this portion of the wheel, when another and more serious injury was found to have happened to the body of the ship itself. An immense perpendicular crack was discovered, on both sides of the vessel, just before the after paddle or sponson beam, extending almost entirely through the second iron plate from the top, and also through a small portion of the upper one. These had been broken asunder with such violence, that, at the worst point of the injury, the plate had bulged outwards in such a manner, that one portion of the broken surface projected to the extent of about two inches, leaving a most formidable opening in the ship's side. In reality, the vessel had begun to separate amidships, from one side to the other. There was every probability, too, that the crack, which at this time was nearly two feet and a half in length, would rapidly extend itself by the working of the ship, unless the weather moderated very speedily. There was every cause for alarm, and little prospect of being able, even temporarily, to repair so serious an injury in the then state of the weather.
It was evident that the broken paddle-wheel could not long hold together, and scarcely any one thought it possible to save the broken portion of it from being lost. But a little ingenuity, stimulated by the necessity of the moment, often suggests the most effectual contrivances, which are, after all, the most simple. The great object was to secure it temporarily in some way or other; so that, as soon as the rim became completely broken through, the mass might hang suspended by some other means from the ship's side. The vessel was rolling heavily, so that there was little chance of being able to pass a rope round it; but the ingenious thought quickly suggested itself, that one of the large boat-anchors would make a capital fish-hook for the purpose. With this, one of the arms was at last caught hold of, and supported, until the rim was completely torn through; and then, by means of a tackle, the large broken portion of the wheel was, with some difficulty, hauled on board.
So far there had been good fortune in the midst of trouble, for, had this portion of the wheel been entirely lost, there is good reason to fear, as will presently be seen, that with only one wheel, which might also have easily become injured, the unfortunate Nemesis would very probably have been unable to outlive the still worse weather which she afterwards encountered, and would have scarcely reached a port, even in a sinking state.
And here we may make two observations. First, that the practice of taking off the float-boards under sail, which, in some steamers, is made a regular exercise for the men, at all times materially weakens the paddle-wheel, particularly in a heavy sea, and may endanger it altogether. Secondly, that an additional paddle-ring, running round the centre of the paddle-arms, and tying them together, contributes very much to the strength of the wheel; and further, that the paddle-centre should never be made of cast iron. It is the most important part of the whole wheel, and should have the utmost strength, which wrought iron alone can give it. It should here be mentioned, that even on this occasion eight only, out of the sixteen float-boards, had been removed, otherwise very probably still more serious damage would have happened. In order to provide against the recurrence of any similar accident, orders were subsequently given, to prepare several small bars of iron, which were to be screwed on in the place of every second float-board removed; so that, if eight float-boards were taken off, four small bars of iron would be put on in their places. Thus the wheel would not lose its proper support and connexion. But, from the experience which had now been gained, it was rarely afterwards thought expedient to take the float-boards off at all, and certainly only in smooth water, and with every appearance of settled weather. The portion of the paddle-wheel which had been torn away on this occasion comprised