His Exercises, Contayning eight Treatises, the Titles where of are set downe in the next Printed Page: which Treatises are very necessary to be read and learned of all young Gentlemen that haue not beene exercised in such Disciplines, and yet are desirous to haue knowledge as well in Cosmographie, Astronomie, and Geographie, as also in the Art of Navigation, in which Art ist is impossible to profit without helpe of these, or such like Instructions.