Ships engaged in this trade were to be searched on arrival at port, and all merchandise found on board was to be confiscated and heavy penalties inflicted. On condition, however, that the company should not attempt any unlawful trade, his Catholic Majesty granted them the privilege, during thirty years, of sending annually a ship of 500 tons to the fair at Porto Bello. The Spanish king was to be concerned one-fourth in the profits.[14] It seems that the company stretched this privilege to the utmost. The ship always stopped at Jamaica, took on all the goods she could, and carried along with her five or six smaller vessels laden with goods. When she got near Porto Bello, all her provisions were put in the tenders and the goods these bore taken aboard. She then entered the harbor laden down to the water's edge. Thus this single ship was made to carry more than five or six of the largest galleons.[15] Thirty years before the Spanish colonies began their war of independence, the British government had entertained the idea of revolutionizing and separating them from Spain. This idea seems to have arisen in 1779, during the administration of Lord North, when Spain joined France in the alliance with the American colonies against Great Britain.[16] It was suggested at first, no doubt, as a measure of retaliation, but was frequently agitated in later years with the avowed object of opening up South America to British commerce. The same idea was the basis of Miranda's scheme for the liberation of his native land.