Mr. Blundevil his exercises : contayning eight treatises, the titles wherof are set down in the next printed page. Which treatises are very necessary to be read and learned of all young gentlemen, that have not been exercised in such disciplines, and yet are desirous to have knowledge as well in cosmographie, astronomie, and geographie, as also in the arte of navigation ... To the furtherance of which art of navigation, the said Mr. Blundevil specially wrote the said treatises, and of meere good will doth dedicate the same to all young gentlemen of this realme.