Those who have no artificial means of ascertaining the progress of time, are in general the most acute in discerning its immediate signs, and are most retentive of individual dates. The mechanical aids to knowledge are not sharpeners of the wits. The understanding of a savage is a kind of natural almanac, and more true in its prognostication of the future. In his mind's eye he sees what has happened or what is likely to happen to him, "as in a map the voyager his course." Those who read the times and seasons in the aspect of the heavens and the configurations of the stars, who count by moons and know when the sun rises and sets, are by no means ignorant of their own affairs or of the common concatenation of events. People in such situations have not their faculties distracted by any multiplicity of inquiries beyond what befalls themselves, and the outward appearances that mark the change. There is, therefore, a simplicity and clearness in the knowledge they possess, which often puzzles the more learned. I am sometimes surprised at a shepherd-boy by the roadside, who sees nothing but the earth and sky, asking me the time of day--he ought to know so much better than any one how far the sun is above the horizon. I suppose he wants to ask a question of a passenger, or to see if he has a watch. Robinson Crusoe lost his reckoning in the monotony of his life and that bewildering dream of solitude, and was fain to have recourse to the notches in a piece of wood. What a diary was his! And how time must have spread its circuit round him, vast and pathless as the ocean!