During seasons of great pestilence, men have often believed the prophecies of crazed fanatics, that the end of the world was come. - Charles Mackay

An epidemic terror of the end of the world has several times spread over the nations. The most remarkable was that which seized Christendom about the middle of the tenth century. Numbers of fanatics appeared in France, Germany, and Italy at that time, preaching that the thousand years prophesied in the Apocalypse as the term of the world’s duration were about to expire, and that the Son of Man would appear in the clouds to judge the godly and the ungodly. The delusion appears to have been discouraged by the Church, but it nevertheless spread rapidly among the people.

For more than a thousand years the art of alchymy captivated many noble spirits, and was believed in by millions. Its origin is involved in obscurity. Some of its devotees have claimed for it an antiquity coeval with the creation of man himself, others, again, would trace it no further back than the time of Noah.

Men, it has been well said, think in herds; it will be seen that they go mad in herds, while they only recover their senses slowly, and one by one.