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Rh Neither before Tycho's time nor afterwards has this little island played any part in the history of Denmark, and yet tradition points to a time long ago when even this little spot is supposed to have been the scene of heroic deeds. On the map appear the ruins of four castles or forts, which are supposed to have been destroyed in 1288, when the Norwegian king, Erik the Priesthater, ravaged the coasts of the Sound. Nowadays a few stones and a slight rise of the ground scarcely marks the site of each fort, but in Tycho's time there were more distinct traces of them left. Their names were Nordborg, on the north coast; Sönderborg, on the south-west coast; Hammer, at the north-east, and Carlshöga, at the south-east corner. Tycho's friend and former tutor, Vedel, published a colleclectioncollection [sic] of ancient Danish popular ballads and romances,