Nor was this all. It was also the period of the greatest outward activity of mankind--the period of voyages, enterprises, discoveries, and inventions of all sorts. This was the era of the great expeditions of the Portuguese along the coasts of Africa, of the discovery of the passage by the Cape of Good Hope, of the discovery of America by Columbus, and of the wonderful extension of European commerce. {196} A multitude of new inventions came forth, whilst others, previously known in a confined sphere, became popular, and passed into general use. Gunpowder changed the system of war, and the compass changed the system of navigation. The art of oil-painting was developed, and covered Europe with masterpieces. Engraving on copper, invented in 1460, multiplied and disseminated them. The use of linen paper became common. Finally, between 1436 and 1452, printing was invented, the theme of so much declamation, and of so many commonplaces, but the merit and effects of which will never be obscured by either vapid declamation or nauseous small-talk. Such was the greatness and activity of this century; a greatness still scarcely apparent, an activity which had not yet brought its results under the disposition of mankind. Violent reforms had been suppressed; governments were consolidated, and the people hushed. It might be imagined that society was preparing merely to enjoy a better order of things, accompanied by a quickened impulse. But the revolutions of the sixteenth century were impending, which the fifteenth had only been preparing. They will be the object of my next lecture. {197} Lecture XII. Effects Of The Reformation.