The inherent love of pictorial representation in all races of men and in every age is manifest by the frequent attempts made to depict natural objects, under the most unfavourable circumstances and with the slenderest means. The rude drawing scratched on the smooth bone of an animal by the cave-dweller of pre-historic times, the painted rocks of the Mexican forests, and the cave-paintings of the Bushmen, are all evidences of this deeply-rooted passion. The child of civilised life looks with delight on his picture book long before he can make out the letters of the alphabet, and the-untutored Esquimaux treasures up the stray number of an illustrated newspaper left in his but by the crew of some whaling ship, though he cannot understand one word of the printed page. But the pictures speak a universal language, which requires no teaching to comprehend.