The southern limit of the voyage, so far as it can be known, was in the vicinity of Cape Romain, South Carolina, though some authors, apparently without sufficient authority—the voyager says he saw palms—have placed the limit in Florida. It is probable that a large part of the United States coast was for the first time explored during this voyage, which also completed the discovery of the whole eastern shore-line of America, except probably a short but indefinite distance in South Carolina and Georgia, between the limits reached by Ponce de Leon in 1513 and by Verrazano; one intermediate point having also been visited by Aillon in 1520. _Relatione di Giouanni da Verrazzano Fiorentìno della terra per lui scoperta in nome di sua Maestà, scritta in Dieppa, adi 8_, Luglio, MDXXIIII., in _Ramusio_, tom. iii. fol. 420. In the preface to this volume, edition of 1556, the author states that it is not known whether New France is joined to Florida or not. _Herrera_, _Hist. Gen._, dec. iii. lib. vi. cap. ix.; _Hakluyt's Divers Voy._, pp. 55-71; _New York Hist. Soc._, _Collections_, 1841, series ii. vol. i.; _Kohl's Hist. Discov._, pp. 249-70; _Hakluyt's Voy._, vol. iii. pp. 295-300; _Aa_, _Naaukeurige Versameling_, tom. x. app. p. 13. A chart given by Verrazano to Henry VIII. is said to have been used by Lock in compiling the map published in _Hakluyt's Divers Voy._, London, 1582. (Reprint by the Hakluyt Society, 1850. Copy in _Kohl_, p. 290.) In 1522 Pedro de Alvarado had accomplished the conquest of Tehuantepec on the South Sea; in 1524 and the following years he extended his explorations and conquests by land across the isthmus over all the north-western region of Central America, joining his conquests to those of his countrymen from Panamá. In 1523 Cristóbal de Olid made an expedition by water to Honduras in the service of Cortés, founding a settlement; and in 1524 Cortés himself marched overland from Mexico to Honduras. _Lettres de Pédro de Alvarado à Fernan Cortés_, in _Ternaux-Compans_, _Voy._, série i. tom. x. pp. 107-50, and in _Ramusio_, _Viaggi_, tom. iii. fol. 296-300; _Peter Martyr_, dec. viii. cap. v. x.; _Oviedo_, _Hist. Gen._, tom. iii. pp. 434, 439, 475-87; _Gomara_, _Hist. Conq. Mex._, fol. 228-33, 245-6, 250-74; _Herrera_, _Hist. Gen._, dec. iii. lib. iii. cap. xvii.; lib. vi. cap. x.-xii.; lib. vii. cap. viii.-ix.; lib. viii. cap. i.-vii.; _Alaman_, _Disertaciones_, tom. i. pp. 203-25; _Brasseur de Bourbourg_, _Hist. Nat. Civ._, tom. iv. pp. 546-50, 598 et seq., 631-705. [Sidenote: CONQUEST OF PERU.] In this same year, 1524, Francisco Pizarro sailed from Panamá southward, and began the conquest of Peru, which, as related elsewhere in this volume, brought to light, before 1540, nearly the whole western coast of South America. For references to Pizarro's discovery see a later chapter of this volume.