The history of the world affords abundant evidence that, in the dawn of civilization, most nations endeavoured to fix and to perpetuate ideas by painting the figures of the objects that produced them. The Egyptian priesthood recorded the mysteries of their religion in graphic emblems of this kind; and the Mexicans, on the first arrival of the Spaniards, informed their prince Montezuma of what was passing by painting their ideas on a roll of cloth. There is no way so natural as this of expressing, and conveying to the understanding of others, the images that pass in the mind, without the help of speech. In the course of the present voyage, an officer of artillery and myself were dispatched to make observations on the small island of _Collao_, near the coast of _Cochin-China_. In order to make the natives comprehend our desire to procure some poultry, we drew on paper the figure of a hen, and were immediately supplied to the extent of our wants. One of the inhabitants taking up the idea drew close behind the hen the figure of an egg, and a nod of the head obtained us as many as we had occasion for. The Bosjesmen Hottentots, the most wild and savage race perhaps of human beings, are in the constant habit of drawing, on the sides of caverns, the representations of the different animals peculiar to the country. When I visited some of those caverns I considered such drawings as the employment of idle hours; but, on since reflecting that in almost all such caverns are also to be seen the figures of Dutch boors (who hunt these miserable creatures like wild beasts) in a variety of attitudes, some with guns in their hands, and others in the act of firing upon their countrymen; waggons sometimes proceeding and at others standing still, the oxen unyoked, and the boors sleeping; and these representations generally followed by a number of lines scored like so many tallies; I am inclined to think they have adopted this method of informing their companions of the number of their enemies, and the magnitude of the danger. The animals represented were generally such as were to be met with in the district where the drawings appeared; this, to a people who subsist by the chace and by plunder, might serve as another piece of important information.