Natural Phenomena of the Ocean—Service at Sea—Mr Vernon—A dead Calm—Fever breaks out—Dispute between Captain and First Mate—Its consequences—Mortality among Passengers—Sight the Land—Teneriffe—Notice of History—Santa Cruz—Attack on it under Lord Nelson—An Excursion up the Peak.

I had during my voyages and travels ample proof of the truth of the remark, that different people see the same object in very different lights. Frequently I had heard persons declare that nothing is more dull and stupid than a long sea voyage—that there is nothing on the ocean to afford interest—nothing to look at, or think about—nothing to do. I have every reason to assert the contrary of this to be the case. Of course I had plenty to do in learning my profession; I did not forget to make ample use of my master’s gift—my sextant; and in this Mr Henley gave me all the assistance in his power. I never failed to make use of it on all occasions, so that in a short time I became a very good observer. I do not say this as a boast, but that others may understand what may be done by attention and perseverance. Sills and Broom used to say that it would be time enough by-and-by to begin learning navigation, and so weeks passed away, and they knew nothing whatever about it.

With regard to objects to be noted at sea, I will only touch on a few of them. The form of the waves varied much as we advanced southward. In the Bay of Biscay they had been exceedingly irregular, and now the crests formed almost straight lines, only one sea now and then rising above his fellows like some huge marine monster, and rolling on in potent majesty, till lost to sight in the distance. The clouds, too, were even for a time varying; one day especially I remember remarking some masses of clouds collecting in the east—Mr Waller called them lightning clouds—their shadowy parts were of a peculiar steel blue, while the brighter portions glowed with a fleshy tint. At dusk, catching the reflection of the sun, they seemed to shine out of the dark sky like pale spectres of gigantic size, casting their supernatural lights over the waves. At midnight the expected lightning burst forth with as almost terror-inspiring grandeur; sometimes eight or ten flashes of forked lightning darted forth at once, lighting up the whole ocean, and showing the dark banks of clouds assembling in the distance. Even when the lightning ceased, so great was the phosphorescence of the ocean, that, as the ship surged onward through it, she seemed to be throwing off masses of sparkling gems from her bows; and as I was looking over the side, I observed a huge shark, or some other ocean monster, swim by amidst a blaze of light. The clouds, like the waves, grew more regular as we sailed south, and at length formed long parallel lines, radiating out of the north-east, and converging into the south-west points of the horizon—finally forming one unbroken sheet over the Canary Islands.

The great difficulty of making observations at sea, except with a sextant—and such, it must be remembered, are of a very rough nature compared with those made on shore—is want of steadiness. The sea is never quiet, and no machine has as yet been invented to counteract the movement of a ship, and obtain a perfect level.

Mr Vernon, the clergyman passenger I spoke of, told me an anecdote of Galileo, showing that, great as he was as an astronomer, he might make a great mistake by forgetting to take all points into consideration. He fancied that he had discovered a method of determining longitudes at sea by observing the eclipses of Jupiter’s satellites. He accordingly went to the King of Spain and offered to manufacture telescopes to enable his navigators to sail across the ocean without fear or hesitation. His telescopes were unexceptionable, and his method excellent, but it depended entirely on the perfect steadiness of the observer; and, as even the biggest ships of the mighty monarch of Spain could not be taught to keep quiet, the great astronomer’s telescopes were perfectly useless.

I was much struck with the fine deep Prussian blue of the waters, which had changed from the cobalt bine of more northern latitudes, as also with its extraordinary power to froth and effervesce. The water, as it was dashed about the decks in the morning from the buckets, sparkled like champagne; but perhaps that was owing more to the nature of the atmosphere than to any peculiarity in the water.

I found that I had several erroneous notions of my own to correct. I always fancied that a porpoise was a great fat lumbering sleepy animal, simply because people are accustomed to say “as fat as a porpoise.” In reality he is a gracefully formed, remarkably fast, sociable, warm-hearted, or rather warm-blooded fellow, with a coat of fat like a paletot on his back, to keep out the chill of the icy seas. He is more like a hunter than a pig; and, as to “rolling and wallowing,” those are expressions used by poets who never saw a porpoise dashing away at twenty or thirty knots an hour, or a whole shoal bearing down upon a ship like a troop of light horse, and escorting her for miles and miles, careering away, darting round and round her as if she were only going at the speed of some heavy baggage waggon; and humbling the pride of those who have been before hugging themselves with the pleasing idea that she has been moving along at a tremendous speed. The back fin is triangular and near the tail; and as the active fish plunges forward through the tumbling seas, the fin seen for an instant, and looking like his back, makes him appear as if he was rolling slowly on in the water—a very different movement from what he really makes, which is rapid in the extreme. While talking of cetaceous animals, to which order the porpoise belongs, I must remark on a very common error held by seaman as well as landsmen, that whales spout out water. The idea is, that the water is taken into the stomach while the whale is feeding, and ejected when he rises to the surface. This is in no sense the case. What the whale spouts forth is a steam-like air, dense with mucous vapour, of which he must empty his lungs before he can take in a fresh supply of atmospheric air to enable him to dive down again to the depths of the ocean.

We were now enjoying the north-east trade wind. The latitude in which these winds are to be met with varies by several degrees, according to the season of the year. An indication that we were entering them was shown by the barometer, which had previously been low, falling still more from 30 degrees 3 minutes to 30 degrees 2 minutes, and even lower. But if I was to go on describing all the phenomena I observed, and all the information on natural history I obtained, I should have no space left for my own adventures, or an account of the countries I visited.

I spoke of Mr Vernon, a clergyman. At first he had been ill, but when he recovered he made a great effort to have religious services held on board on each Sunday, as well as on other days of the week. The captain and first mate, as may be supposed, objected to the measure.

“People might go to church when they got on shore if they liked, but on board his ship he was not going to have anything of that sort,” was the captain’s reply.