The arte of nauigation : conteyning a compendious description of the sphere, with the makyng of certayne instrumentes and rules for nauigations: and exemplified by many demonstrations. Written in the Spanishe tongue by Martin Curtes, and directed to the Emperour Charles the fyft. Translated out of Spanyshe into Englyshe by Richarde Eden, and now newly corrected and amended in dyuers places. 1572.