Once on the island of Hispaniola, Buil saw the effects of the conquistadors and quarreled with Columbus over the harsh treatment of colonists and Indians.
Seeing that the situation for evangelization and catechizing was impossible, Buil left for Spain, defeated, within six months on 3 Dec. Two other friars whom he had left in the Americas returned to Spain in 1499.
An important if initially unintended effect of the combination of this papal bull and the Treaty of Tordesillas was that nearly all the Pacific Ocean and the west coast of North America were given to Spain.
King John II naturally declined to enter into a hopeless competition at Rome, and simply ignored the bulls, thus neither admitting their authority nor defying the Church.
Spanish and Portuguese delegates met and debated from April to November 1493, without reaching an agreement.
Columbus was still in Lisbon when he sent a report of his success to the Spanish monarchs.
The treaty had been ratified with the 1481 papal bull Aeterni regis, which confirmed previous bulls of 1452 (Dum diversas), 1455 (Romanus Pontifex), and 1456 (Inter caetera), recognizing Portuguese territorial claims along the West African coast.
It was the King's understanding that the terms of the treaty acknowledged Portuguese claims to all territory south of the Canaries (which had been ceded to Spain).
all islands and mainlands found and to be found, discovered and to be discovered towards the west and south, by drawing and establishing a line from ... the said line to be distant one hundred leagues towards the west and south from any of the islands commonly known as the Azores and Cape Verde.
Spain and Portugal could pass each other toward the west or east, respectively, on the other side of the globe and still possess whatever lands they were first to discover.
Before Christopher Columbus received support for his voyage from Queen Isabella and King Ferdinand of Spain, he had first approached King John II of Portugal.