How the Old Navigators Managed

It is extremely difficult to understand how the old navigators contrived to convey their ships from port to port. I do not mean the ancients, who are supposed to have kept the land aboard and to have steered by the stars, though it is certain that they must again and again have been blown out to sea and yet made shift to get home again; but those early voyagers who travelled to the Indies by way of the Cape and to the American seaboard. They had no conception of longitude; they had no means to determine it; and their latitude was extremely vague. An old chart or map is often a strange sight. The figuration of continents and islands is as little like the reality as a child's fanciful drawing of such things would be. The longitude is mere guesswork, and the "heights" or parallels are leagues out. Yet these old people managed to reach the places they started for. Sometimes, to be sure, if the trip were a long one, they found themselves off the land at a distance of a hundred miles or so north or south, as it might be, of their port; but, when you consider that even their knowledge of the variation of the compass was extremely imperfect-that the compass with them was a sluggish primitive appliance-that they could be sure of nothing but their dead-reckoning and the North Star-it should be amazing to us, who live in the age of the exquisite sextant, the superb chronometer, Sir William Thompson's compass, the patent revolving log and Admiralty charts, that mariners from the days of Diaz, Columbus, and Magellan, down to the period of Dr. Maskelyne, the "Nautical Almanac," and the establishment of the Board of Longitude in the last century, should have been able, without hesitation or difficulty, to push on their hundred different ways through the ocean, and duly arrive at the parts they weighed for.

A list of the instruments in use at sea two centuries ago is published as a supplement to Captain James's "Strange and Dangerous Voyage in his intended Discovery of the North-West Passage into the South Sea, in the years 1631 and 1632," contained in "Churchill's Collection," vol. ii., 1704. The captain took with him a quadrant, "of old season'd pear-tree wood, artificially made, and with all care possible divided into diagonals, even to minutes. " It was four-foot semi-diameter, adds the captain.