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Geographical boundaries of the four voyages
Geographic boundaries of the four voyages

[In the first two voyages] we passed the equator by 6½ degrees, and later returned to the north far enough for the North Star to rise above our horizon 35½ degrees; and to the west, we sailed 84 degrees from the meridian of the city and port of Cadiz.

Letter to Lorenzo di Pierfrancesco de’ Medici, July 18, 1500 (Formisano 1992, p. 15)

And the extent of the land seen and navigated by me [in the four voyages] is contained within these two tropics, or more precisely, parallels: the one is at the northern region, thirty-three degrees from the equator, the opposite one south of that line by thirty-two [sic: read "fifty-two"] degrees; and you must not think it lies within a single meridian, but rather several: because by the aforesaid calculation of latitude, I maintain that I sailed so far by land and sea that it totaled ninety-two degrees of latitude, and I have established that I travelled within different meridians, and the farthest meridian to the west was by my reckoning 51/3 hours from the meridian of this Portuguese city, and about eight hours from the meridian of Ferrara, and by hours I am speaking of the equinoctial kind.

Ridolfi Fragment (Formisano 1992, p. 38)