While at Barcelona, in 1492, Ferdinand narrowly escaped being killed by an assassin. King Ferdinand had not much intellectual culture; and Isabella was far superior to her husband in literary attainments. But Ferdinand was a capable man in the military and practical affairs of his kingdom. The children of Ferdinand and Isabella received unusual education for those times, and acquired rare attainments. Prince John, heir to their throne, was reared with the greatest care. But just after the marriage of the young prince to Princess Margaret, daughter of the Emperor Maximilian of Austria, which was celebrated with great magnificence, Prince John was stricken with a fever, and died. Thus perished their only son. Their eldest daughter, Isabella, who had married the king of Portugal, died soon after the death of her brother, Prince John. This daughter left a babe, who thus became heir to Portugal, Aragon, and Castile; but ere a year had passed the infant also sank into the grave. Their daughter Joanna was married to the archduke Philip, son and heir of Maximilian. This unhappy princess was the mother of Charles V. of Spain. But her life was clouded with gloom, occasioned by her husband’s neglect, which at last caused her insanity. The youngest daughter of Ferdinand and Isabella, Catharine of Aragon, afterwards had the misfortune to marry the infamous Henry VIII. of England. Thus, the last days of these illustrious sovereigns were overshadowed with heart-rending sorrows. We can barely note the subsequent discoveries of Columbus. Before his second voyage, while at Barcelona, he was invited by the grand cardinal of Spain to dine with him. An envious guest inquired of Columbus if he thought that there was no man in Spain capable of discovering the Indies, if he had not made the discovery. Columbus, without replying to the question, took an egg from the table, and asked if there was any one who could make it stand on one end. They all tried, but failed. Whereupon Columbus, by a slight blow, crushed the end of the egg, and left it standing before them, saying, “You see how easy it is to do a thing after some one has shown you how.”