20/23 23 min., or 80 deg. In this observation there is an error of eighteen degrees, the true longitude of the island of Saona, where the observation was taken, being 62 deg. 20' west of Cadiz; and the error is accounted for partly by the inaccuracy of the tables of Regiomontanus and partly by the crudity and inexactness of the Admiral's methods. On the 24th of September they at last reached the easternmost point of Espanola, named by Columbus San Rafael. They stood to the east a little longer, and discovered the little island of Mona, which lies between Espanola and Puerto Rico; and from thence shaped their course west-by-north for Isabella. |