The question -- Part One. What knew the Portuguese of this great country? -- 1. Prince Henry the Navigator -- 2. The Portolans -- 3. The Treaty of Tordesillas -- 4. The Line of Demarcation -- 5. Timor -- 6. India Meridional -- 7. The cartographical spies
-- Part Two. Old-time charts bespeak some knowledge -- 8. The Dauphin Map -- 9. Java -- 10. The Antarctic extension -- 11. The Lisbon mapmakers -- 12. Loxodromes and erration -- 13. Magnetic south -- 14. The Rio Grande -- 15. From Rotz to Desliens -- 16. Mercator and de Jode -- Part Three. In their rivalry with Spain they kept a secret.
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