Copernicus did not live to witness any part of the effect produced by his book. A sudden attack of dysentery and paralysis put an end to his life, within a few hours after the first printed copy had been shown to him, in his seventy-second year, on the 24th May, 1543, one century before the birth of Newton. The house at Thorn, in which he is said to have been born, is still shown, as well as that at Frauenburg, in which he passed the greater part of his life. An hydraulic machine, of which only the remains now exist, for supplying the houses of the canons with water, and another of similar construction at Graudenz, which is still in use, are said to have been constructed by him. An account of them may be seen in Nanke’s Travels. From the little that is known of Copernicus’s private character, his morals appear to have been unexceptionable; his temper good, his disposition kind, but inclining to seriousness. He was so highly esteemed in his own neighbourhood, that the attempt of a dramatic author to satirise him, by introducing his doctrine of the earth’s motion upon the stage at Elbing, was received by the audience with the greatest indignation. He was buried in the cemetery of the chapter of Ermeland, and only a plain marble slab, inscribed with his name, marked the place of his interment. Until this was rediscovered in the latter half of the last century, an opinion prevailed that his remains had been transported to Thorn, and buried in the church of St. John, where the portrait of him is preserved, from which most of the prints in circulation have been taken. It is engraved in Hartknoch’s Prussia, and, according to that author, copies of it were frequently made. The portrait prefixed to Gassendi’s life, is a copy of that given in Boissard, with the addition of a furred robe. There is a good engraving of the same likeness, by Falck, a Polish artist, who lived about a century later than Copernicus. In the year 1584, Tycho Brahe commissioned Elia Olai to visit Frauenburg, for the purpose of more accurately determining the latitude of Copernicus’s observatory, and, on that occasion, received as a present from the chapter the Ptolemaic scales, made by the astronomer himself, which he used in his observatory, and also a portrait of him said to have been painted by his own hand. Tycho placed these memorials, with great honour, in his own observatory, but it is not known what became of them after his death, and the dispersion of his instruments. The portrait, from which the engraving prefixed to this account is taken, belongs to the Royal Society, to which it was sent by Dr. Wolff, from Dantzig, in 1776. It was copied by Lormann, a Prussian artist, from one which had been long preserved and recognised as an original in the collection of the Dukes of Saxe Gotha. In 1735, Prince Grabowski, bishop of Ermeland, exchanged for it the portrait of an ancestor of the reigning duke, who had been formerly bishop of that see.