We owe the great discovery of Newton to a very trivial accident. When a student at Cambridge, he had retired during the time of the plague into the country. As he was reading under an apple-tree, one of the fruit fell, and struck him a smart blow on the head. When he observed the smallness of the apple, he was surprised at the force of the stroke. This led him to consider the accelerating motion of falling bodies; from whence he deduced the principle of gravity, and laid the foundation of his philosophy. Ignatius Loyola was a Spanish gentleman who was dangerously wounded at the siege of Pampeluna. Having heated his imagination by reading the Lives of the Saints, which were brought to him in his illness instead of a romance, he conceived a strong ambition to be the founder of a religious order; whence originated the celebrated society of the Jesuits. Rousseau found his eccentric powers first awakened by the advertisement of the singular annual subject which the Academy of Dijon proposed for that year, in which he wrote his celebrated Declamation against the arts and sciences; a circumstance which determined his future literary efforts. La Fontaine, at the age of twenty-two, had not taken any profession or devoted himself to any pursuit. Having accidentally heard some verses of Malherbe, he felt a sudden impulse, which directed his future life. He immediately bought a Malherbe, and was so exquisitely delighted with this poet that after passing the nights in treasuring his verses in his memory, he would run in the daytime to the woods, where, concealing himself, he would recite his verses to the surrounding dryads. Flamsteed was an astronomer by accident. He was taken from school on account of his illness, when Sacrobosco's book 'De Sphæra' having been lent to him, he was so pleased with it that he immediately began a course of astronomic studies. Pennant's first propensity to natural history was the pleasure he received from an accidental perusal of Willoughby's work on birds; the same accident, of finding on the table of his professor Reaumur's 'History of Insects,'--of which he read more than he attended to the lecture.--and having been refused the loan, gave such an instant turn to the mind of Bonnet that he hastened to obtain a copy, but found many difficulties in procuring this costly work. Its possession gave an unalterable direction to his future life: this naturalist indeed lost the use of his sight by his devotion to the microscope. Dr. Franklin attributes the cast of his genius to a similar accident. "I found a work of Defoe's, entitled an 'Essay on Projects,' from which perhaps I derived impressions that have since influenced some of the principal events of my life." I shall add the incident which occasioned Roger Ascham to write his 'Schoolmaster,' one of the most curious and useful treatises among our elder writers.