I.13: Events Of The First Voyage

"In nomine D.N. Jesu Christi—Friday, August 3, 1492, at eight o'clock we started from the bar of Saltes. We went with a strong sea breeze sixty miles,—[Columbus reckoned in Italian miles, of which four = one league.]—which are fifteen leagues, towards the south, until sunset: afterwards to the south-west and to the south, quarter south-west, which was the way to the Canaries."

With these rousing words the Journal

[The account of Columbus's first voyage is taken from a Journal written by himself, but which in its original form does not exist. Las Casas had it in his possession, but as he regarded it (no doubt with justice) as too voluminous and discursive to be interesting, he made an abridged edition, in which the exact words of Columbus were sometimes quoted, but which for the most part is condensed into a narrative in the third person. This abridged Journal, consisting of seventy-six closely written folios, was first published by Navarrette in 1825. When Las Casas wrote his 'Historie,' however, he appears here and there to have restored sections of the original Journal into the abridged one; and many of these restorations are of importance. If the whole account of his voyage written by Columbus himself were available in its exact form I would print it here; but as it is not, I think it better to continue my narrative, simply using the Journal of Las Casas as a document.]

of Columbus's voyage begins; and they sound a salt and mighty chord which contains the true diapason of the symphony of his voyages. There could not have been a more fortunate beginning, with clear weather and a calm sea, and the wind in exactly the right quarter. On Saturday and Sunday the same conditions held, so there was time and opportunity for the three very miscellaneous ships' companies to shake down into something like order, and for all the elaborate discipline of sea life to be arranged and established; and we may employ the interval by noting what aids to navigation Columbus had at his disposal.

The chief instrument was the astrolabe, which was an improvement on the primitive quadrant then in use for taking the altitude of the sun. The astrolabe, it will be remembered, had been greatly improved, by Martin Behaim and the Portuguese Commission in 1840—[1440 D.W.]; and it was this instrument, a simplification of the astrolabe used in astronomy ashore, that Columbus chiefly used in getting his solar altitudes. As will be seen from the illustration, its broad principle was that of a metal circle with a graduated circumference and two arms pivoted in the centre. It was made as heavy as possible; and in using it the observer sat on deck with his back against the mainmast and with his left hand held up the instrument by the ring at the top. The long arm was moved round until the two sights fixed upon it were on with the sun. The point where the other arm then cut the circle gave the altitude. In conjunction with this instrument were used the tables of solar declination compiled by Regiomontanus, and covering the sun's declination between the years 1475 and 1566.

The compass in Columbus's day existed, so far as all essentials are concerned, as it exists to-day. Although it lacked the refinements introduced by Lord Kelvin it was swung in double-cradles, and had the thirty-two points painted upon a card. The discovery of the compass, and even of the lodestone, are things wrapt in obscurity; but the lodestone had been known since at least the eleventh century, and the compass certainly since the thirteenth. With the compass were used the sea charts, which were simply maps on a rather larger and more exact scale than the land maps of the period. There were no soundings or currents marked on the old charts, which were drawn on a plane projection; and they can have been of little—practical use to navigators except in the case of coasts which were elaborately charted on a large scale. The chart of Columbus, in so far as it was concerned with the ocean westward of the Azores, can of course have contained nothing except the conjectured islands or lands which he hoped to find; possibly the land seen by the shipwrecked pilot may have been marked on it, and his failure to find that land may have been the reason why, as we shall see, he changed his course to the southward on the 7th of October. It must be remembered that Columbus's conception of the world was that of the Portuguese Mappemonde of 1490, a sketch of which is here reproduced.

This conception of the world excluded the Pacific Ocean and the continent of North and South America, and made it reasonable to suppose that any one who sailed westward long enough from Spain would ultimately reach Cathay and the Indies. Behaim's globe, which was completed in the year 1492, represented the farthest point that geographical knowledge had reached previous to the discoveries of Columbus, and on it is shown the island of Cipango or Japan.

By far the most important element in the navigation of Columbus, in so far as estimating his position was concerned, was what is known as "dead-reckoning" that is to say, the computation of the distance travelled by the ship through the water. At present this distance is measured by a patent log, which in its commonest form is a propeller-shaped instrument trailed through the water at the end of a long wire or cord the inboard end of which is attached to a registering clock. On being dragged through the water the propeller spins round and the twisting action is communicated by the cord to the clock-work machinery which counts the miles. In the case of powerful steamers and in ordinary weather dead-reckoning is very accurately calculated by the number of revolutions of the propellers recorded in the engine-room; and a device not unlike this was known to the Romans in the time of the Republic. They attached small wheels about four feet in diameter to the sides of their ships; the passage of the water turned the wheels, and a very simple gearing was arranged which threw a pebble into a tallypot at each revolution. This device, however, seems to have been abandoned or forgotten in Columbus's day, when there was no more exact method of estimating dead-reckoning than the primitive one of spitting over the side in calm weather, or at other times throwing some object into the water and estimating the rate of progress by its speed in passing the ship's side. The hour-glass, which was used to get the multiple for long distances, was of course the only portable time measurer available for Columbus. These, with a rough knowledge of astronomy, and the taking of the altitude of the polar star, were the only known means for ascertaining the position of his ship at sea.

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