Edmund Halley, one of the greatest astronomers of an age which produced many, was born at a country house named Haggerston, in the parish of St. Leonard, Shoreditch, October 29, 1656. His father, a wealthy citizen and soap-boiler, intrusted the care of his son’s education to Dr. Gale, master of St. Paul’s School. Here young Halley applied himself to the study of mathematics and astronomy with what was then considered great success; for, before he left school, he understood the use of the celestial globe, and could construct a sun-dial; and, as he has himself informed us, had already observed the variation of the needle. In 1673, being in the seventeenth year of his age, he was entered of Queen’s College, Oxford, and two years afterwards gave the first proof of his astronomical genius by publishing, in the Philosophical Transactions, 1676, “a direct and geometrical method of finding the Aphelia and Eccentricities of the Planets.” His father, who seems to have had none of that antipathy to a son’s engaging in literary or scientific pursuits, which is represented as common to men of commerce by the writers of that age, supplied him liberally with astronomical instruments. Thus assisted, he made many observations, particularly of Jupiter and Saturn, by means of which he discovered that the motion of Saturn was slower, and that of Jupiter quicker than could be accounted for by the existing tables; and made some progress in correcting those tables accordingly. But he soon found that nothing could be done without a good catalogue of the stars. This, it appears, he had some intention of forming; but finding that Hevelius and Flamsteed were already employed on the same work, he proposed to himself to proceed to the southern hemisphere, and to complete the design by observing those stars which never rise above the horizons of Dantzic and Greenwich. Having obtained his father’s consent, and an allowance of £300 a-year; and having fixed upon St. Helena as the most convenient spot, he applied to Sir Joseph Williamson and Sir Jonas Moor, the Secretary of State and the Surveyor of the Ordnance. These gentlemen represented his intention in a favourable light to Charles II., and also to the East-India Company, who promised him every assistance in their power. Thus protected, he set out for St. Helena in 1676; his principal instruments being a sextant of five feet and a half radius, and a telescope of twenty-four feet in length. He found the climate not so favourable as he had been led to believe, and moreover describes himself as disgusted with the treatment he received from the Governor. Under these disadvantages, he nevertheless formed a catalogue of 350 stars, which he afterwards published under the name of ‘Catalogus Stellarum Australium.’ He called a new constellation which he had observed, by the title of _Robur Carolinum_, in honour of the well-known oak of Charles II. While at St. Helena he also observed a transit of Mercury, and suggested the use