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Rh Tycho a copy of a letter he had received from Hieronimus Munosius of Valencia on this subject, and Tycho tried in vain to dissuade him from publishing an answer to the scurrilous and absurd assertions of Raimundus of Verona. Another and most precious gift which Hagecius bestowed on Tycho on this occasion was a copy of a MS. by Copernicus, De Hypothesibus Motuum Cœlestium Commentariolus, an account of the new system of the world, which its author had written for circulation among friends some ten years before the publication of his book, De Revolutionibus, but which had never been printed. In after years Tycho communicated copies of this literary relic to various German astronomers. Probably he presented to Hagecius in return a copy of his own paper on the star, as the latter is quoted in Hagecius' reply to Raimundus.

From Ratisbon Tycho returned home viâ Saalfeld and Wittenberg. At the former place he visited Erasmus Reinhold, the younger, a son of the author of the "Prutenic Tables," who showed him his father's manuscripts, among which were extended tables of the equations of centre of the planets for every 10′ of the anomaly. At Wittenberg he inspected the wooden triquetrum with which Wolfgang