Sandwich Island is twenty-five leagues in circuit; its greatest extent is ten leagues; and it lies in the direction of N.W. by W. and S.E. by E. The N.W. coast of this island we only viewed at a distance; therefore our chart of this part may be faulty so far as it regards the line of the coast, but no farther. The distance from the south end of Mallicollo to the N.W. end of Sandwich Island, is twenty-two leagues in the direction of S.S E. 1/2 E.
In the same direction lie Erromango, Tanna, and Annatom. The first is eighteen leagues from Sandwich Island, and is twenty-four or twenty-five leagues in circuit. The middle of it lies in the latitude of 18° 54', longitude 169° 19' E., and it is of a good height, as may be gathered from the distance we were off when we first saw it.
Tanna lies six leagues from the south side of Erromango, extending S.E. by S. and N.W. by N., about eight leagues long in that direction, and every where about three or four leagues broad.
The isle of Immer lies in the direction of N. by E. 1/2 E., four leagues from Port Resolution in Tanna; and the island of Erronan or Footoona East, in the same direction, distant eleven leagues. This, which is the most eastern island of all the Hebrides, did not appear to be above five leagues in circuit, but is of a considerable height and flat at top. On the N.E. side is a little peak seemingly disjointed from the isle; but we thought it was connected by low land. Annatom, which is the southernmost island, is situated in the latitude of 20° 3', longitude 170° 4', and S. 30° E., eleven or twelve leagues from Port Resolution. It is of a good height, with an hilly surface; and more I must not say of it.[7]
[7] "This group of islands, which we had now cursorily examined in the space of forty-six days, seems to be well worth the attention of future navigators, especially if they should ever be sent out upon the liberal plan of making discoveries in all the various branches of science. I will not pretend to say that they would find great riches of silver and pearls, which Quiros was forced to speak of, in order to engage an interested, avaricious court, to support his great and spirited undertakings. These incitements are not necessary now-a-days, when several monarchs in Europe have convinced the world that they can institute voyages of discovery, with no other view than the increase of human knowledge, and the improvement of man-kind. The sums which some of their predecessors have lavished on parasites, have been found sufficient to make an immense progress, nay to produce a new and important revolution in the state of the sciences, which have ever required a trifling expence to triumph over the numberless obstacles that ignorance, envy, or superstition opposed against them."--G.F.
This gentleman we see, is capable of courtesy. The terms in which it is expressed, however, are sufficiently guarded against admitting too great a latitude of application, and consequently, are not particularly liable to abuse--the less so indeed, as it is likely, that those who might most covet his commendation, would be found best entitled to it. The recent distractions of Europe, however, have not enhanced the claims of its monarchs to the honour of patronising such important undertakings. Some of them, it is probable, are content with the common but assuredly not less expensive ambition of having shared, though but by proxy, in a more splendid speculation for fame: And the glory so acquired, they may chance to think, is ample enough, without farther concern, to gild their names throughout all succeeding generations. If so, unfortunately, there is an end of such labours of discovery as are here recommended; and the islands in question must remain unexplored, till the increase of human knowledge, and the improvement of mankind, are thought practicable without bloodshed, and are felt to be cheaply purchased by the sacrifice of personal ostentation and public extravagance. Let us hope that the early example of the truly noble Alexander, in comparatively untoward circumstances of the world, will be emulated by older sovereigns, who cannot but be sensible, notwithstanding their catholic affection, that no small exercise of philanthropy and the love of science is required, to give them any thing like an equal chance for immortality.--E.
Here follow the lunar observations by Mr Wales, for ascertaining the longitude of these islands, reduced by the watch to Port Sandwich in Mallicollo, and Port Resolution in Tanna.
Port Sandwich, ( Mean of 10 sets of ob. before 167° 56' 33" 1/4 ) E.
( 2 ditto, at 168 2 37 1/2 ) long
( 20 ditto, after 167 52 57 )
( ----------------
( Mean of those means, 167 57 22 3/4
Port Resolution, ( Mean of 20 sets of ob. before 169 37 35 ) E.
( 5 ditto, at 169 48 48 ) long
( 20 ditto, after 169 47 22 1/2 )
( ----------------
( Mean of these means, 169 44 33
It is necessary to observe, that each set of observations, consisting of between six and ten observed distances of the sun and moon, or moon and stars, the whole number amounts to several hundreds; and these have been reduced by means of the watch to all the islands; so that the longitude of each is as well ascertained as that of the two ports above-mentioned. As a proof of this I shall only observe, that the longitude of the two ports, as pointed out by the watch and by the observations, did not differ two miles. This also shews what degree of accuracy these observations are capable of, when multiplied to a considerable number, made with different instruments, and with the sun and stars, or both sides of the moon. By this last method, the errors which may be either in the instruments or lunar tables, destroy one another, and likewise those which may arise from the observer himself; for some men may observe closer than others. If we consider the number of observations that may be obtained in the course of a month (if the weather is favourable,) we shall perhaps find this method of finding the longitude of places as accurate as most others; at least it is the most easy, and attended with the least expence to the observer. Every ship that goes to foreign parts is, or maybe, supplied with a sufficient number of quadrants at a small expence; I mean good ones, proper for making these observations. For the difference of the price between a good and a bad one, I apprehend, can never be an object with an officer. The most expensive article, and what is in some measure necessary in order to arrive at the utmost accuracy, is a good watch; but for common use, and where that strict accuracy is not required, this may be dispensed with. I have observed before, in this journal, that this method of finding the longitude is not so difficult but that any man, with proper application, and a little practice, may soon learn to make these observations as well as the astronomers themselves. I have seldom known any material difference between the observations made by Mr Wales, and those made by the officers at the same time.
In observing the variation of the magnetic needle, we found, as usual, our compasses differ among themselves, sometimes near 2°; the same compass too, would sometimes make nearly this difference in the variation on different days, and even between the morning and evening of the same day, when our change of situation has been but very little. By the mean of the observations which I made about Erromango; and the S.E. part of these islands, the variation of the compass was 10° 5' 48" E.; and the mean of those made about Tierra del Espiritu Santo, gave 10° 5' 30" E. This is considerably more than Mr Wales found it to be at Tanna. I cannot say what might occasion this difference in the variation observed at sea and on shore, unless it be influenced by the land; for I must give the preference to that found at sea, as it is agreeable to what we observed before we made the islands, and after we left them.
SECTION VIII.