Petrus Plancius

Mr. Blundevil His exercises, contayning eight treatises ... which treatises are very necessary to be read and learned of all young gentlemen that have not been excercised in such disciplines, and yet are desirous to have knowledge as well in cosmographie, astronomie and geographie, as also in the art of navigation, in which art it is impossible to profit without the help of these or such like instructions / To the furtherance of which art of navigation, the said Mr. Blundevil specially wrote the said treatises.