Voyages of Samuel De Champlain — Volume 03

by Samuel de Champlain

227. Paul Huet and Pacifique du Plessis. The latter had been in New France
more than a year and a half, having arrived in 1615. Vide antea,
pp. 104-5.

EXPLANATION OF TWO GEOGRAPHICAL MAPS OF NEW FRANCE.

It has seemed to me well to make some statements in explanation of the two geographical maps. Although one corresponds to the other so far as the harbors, bays, capes, promontories, and rivers extending into the interior are concerned, nevertheless they are different in respect to the bearings.

The smallest is in its true meridian, in accordance with the directions of Sieur de Castelfranc in his book on the mecometry of the magnetic needle [228] where I have noted, as will be seen on the map, several declinations, which have been of much service to me, so also all the altitudes, latitudes, and longitudes, from the forty-first degree of latitude to the fifty-first, in the direction of the North Pole, which are the confines of Canada, or the Great Bay, where more especially the Basques and Spaniards engage in the whale fishery. In certain places in the great river St. Lawrence, in latitude 45°, I have observed the declination of the magnetic needle, and found it as high as twenty-one degrees, which is the greatest I have seen.

The small map will serve very well for purposes of navigation, provided the needle be applied properly to the rose [229] indicating the points of the compass. For instance, in using it, when one is on the Grand Bank where fresh fishing is carried on, it is necessary, for the sake of greater convenience, to take a rose where the thirty-two points are marked equally, and put the point of the magnetic needle 12, 15, or 16 degrees from the fleur de lis on the northwest side, which is nearly a point and a half, that is north a point northwest or a little more, from the fleur de lis of said rose, and then adjust the rose to the compass. By this means the latitudes of all the capes, harbors, and rivers can be accurately ascertained.

I am aware that there are many who will not make use of it, but will prefer to run according to the large one, since it is made according to the compass of France, where the magnetic needle varies to the northeast, for the reason that they are so accustomed to this method that it is difficult for them to change. For this reason I have prepared the large map in this manner, for the assistance of the majority of the pilots and mariners in the waters of New France, fearing that if I had not done so, they would have ascribed to me a mistake, not knowing whence it proceeded. For the small plans or charts of Newfoundland are, for the most part, different in all their statements with respect to the positions of the lands and their latitudes. And those who may have some small copies, reasonably good, esteem them so valuable that they do not communicate a knowledge of them to their country, which might derive profit therefrom.

Now the construction of these maps is such that they have their meridian in a direction north-northeast, making west west-northwest, which is contrary to the true meridian of this place, namely, to call north-northeast north, for the needle instead of varying to the northwest, as it should, varies to the northeast as if it were in France. The consequence of this is that error has resulted, and will continue to do so, since this antiquated custom is practised, which they still retain, although they fall into grave mistakes.

They also make use of a compass marked north and south; that is, so that the point of the magnetic needle is directly on the fleur de lis. In accordance with such a compass many construct their small maps, which seems to me the better way, and so approach nearer to the true meridian of New France, than the compasses of France proper, which point to the northeast. It has come about, consequently, in this way that the first navigators who sailed to New France thought there was no greater deviation in going to these parts than to the Azores, or other places near France, where the deviation is almost imperceptible in navigation, the navigators having the compasses of France, which point northeast and represent the true meridian. In sailing constantly westward with the purpose of reaching a certain latitude, they laid their course directly west by their compass, supposing that they were sailing on the one parallel where they wished to go. By thus going constantly in a straight line and not in a circle, as all the parallels on the surface of the globe run, they found after having traversed a long distance, and as they were approaching the land, that they were some three, four, or five degrees farther south than they ought to be, thus being deceived in their true latitude and reckoning.

It is true, indeed, that, when the weather was fair and the sun clearly visible, they corrected their latitude, but not without wondering how it happened that their course was wrong, which arose in consequence of their sailing in a straight instead of a circular line according to the parallel, so that in changing their meridian they changed with regard to the points of the compass, and consequently their course. It is, therefore, very necessary to know the meridian, and the declination of the magnetic needle, for this knowledge can serve all navigators. This is especially so in the north and south, where there are greater variations in the magnetic needle, and where the meridians of longitude are smaller, so that the error, if the declination were not known, would be greater. This above-mentioned error has accordingly arisen, because navigators have either not cared to correct it, or did not know how to do so, and have left it in the state in which it now is. It is consequently difficult to abandon this manner of sailing in the regions of New France.

This has led me to make this large map, not only that it might be more minute than the small one, but also in order to satisfy navigators, who will thus be able to sail as they do according to their small maps; and they will excuse me for not making it better and more in detail, for the life of a man is not long enough to observe things so exactly that at least something would not be found to have been omitted. Hence inquiring and pains-taking persons will, in sailing, observe things not to be found on this map, but which they add to it, so that in the course of time there will be no doubt as to any of the localities indicated. At least it seems to me that I have done my duty, so far as I could, not having sailed to put on my map anything that I have seen, and thus giving to the public special knowledge of what had never been described, nor so carefully explored as I have done it. Although in the past others have written of these things, yet very little in comparison with what we have explored within the past ten years.