The mission sent by King Manuel in return was far-reaching in its effects upon the political development of Kongo.[316] Of its magnitude we may judge when we learn that it embarked in five vessels. Its leader, Simão da Silva, dying on the road to S. Salvador, his place was taken by Alvaro Lopes, the Royal factor. In his company were priests, experienced soldiers, masons and carpenters to build churches and a royal palace, and a lawyer (_leterado_) to explain the law books which figured among the royal gifts, besides horses, mules, cloth, banners, church furniture and images. The ambassador was instructed to explain the management of the royal household in Portugal, and King Affonso quickly learnt the lessons he received, and at once introduced the Portuguese titles of Duke, Marquis, and Count. The ambassador likewise had with him an elaborate coat-of-arms for the King,[317] and twenty less ambitious heraldic designs for his principal noblemen; and the monarch himself adopted a title closely imitated from that of his “brother” of Portugal.[318] The ambassador was likewise instructed to make inquiries about the origin of the Kongo in a lake, and to bring home cargoes of slaves, copper and ivory. The King was delighted with all these gifts, not being aware that by accepting them he virtually acknowledged himself to be a vassal of the King of Portugal; and he published a long manifesto to his people, in which he dwelt upon his past career, the blessings of the Christian faith, and the honours now done him. He actually read the six bulky folios, but he told Ruy d’Aguiar (in 1516) that if complicated laws like these were to be introduced in his dominions, not a day would pass without a legal offence of some kind being committed.[319] The intercourse between Kongo and Lisbon must have been very active in those days. We learn, for instance, that in 1526 the King asked for physicians and apothecaries, and in 1530 he forwarded to his “brother” Manuel two silver bracelets, which he had received from Matamba. Many young Kongoese were sent to Portugal to be educated; but, to judge from a letter written by the King in 1517, the results were not always very gratifying.[320] Nay, he accuses Antonio Viera, to whom he entrusted twenty young relations to be taken to Portugal, of having parted with several among them to Mpanzu-alumbu, his enemy, and of having left others behind him at S. Thomé.[321] A second embassy left Kongo in 1540, to do homage to Pope Paul III. It was headed by D. Manuel, a brother of the King, who had been a member of D. Pedro’s mission. King Affonso expected the King of Portugal to pay 3,000 cruzados towards the expenses of this mission, in consideration of the large profits which he derived from the trade with Kongo.[322]