As in other parts of the East Indies, however, the Dutch presently began to dispute the supremacy of their rivals, and, partly by the injudicious and presumptuous arrogance of the Portuguese themselves, succeeded in supplanting them. The cool and mercenary cunning of the greedy Hollanders was more than a match for the proud temper of the hot-blooded Dons. And as, in the case of Japan, the story of Simabara lives in history to witness what shameless and unscrupulous wickedness commercial rivalry could lead to; so in Siam there is for fifty years a story of intrigue and greed, over-reaching itself first on one side, and then on the other. First, the Portuguese were crowded out of their exclusive privileges. And then in turn the Dutch were obliged to surrender theirs. To-day there are still visible in the jungle, near the mouth of the Meinam River, the ruins of the Amsterdam which grew up between the years 1672 and 1725, under the enterprise of the Dutch East India Company, protected and fostered by the Siamese Government. And to-day, also, the descendants of the Portuguese, easy to be recognized, notwithstanding the mixture of blood for many generations, hold insignificant or menial offices about the capital and court.
As a result of Portuguese intercourse with Siam, there came the introduction of the Christian religion by Jesuit missionaries, who, as in China and Japan, were quick to follow in the steps of the first explorers. No hindrance was put in the way of the unmolested exercise of religious rites by the foreign settlers. Two churches were built; and the ecclesiastics in charge of the church at Ayuthia had begun to acquire some of that political influence which is so irresistible a temptation to the Roman Catholic missionary, and so dangerous a possession when he has once acquired it. It is probable enough (although the evidence does not distinctly appear) that this tendency of religious zeal toward political intrigue inflamed the animosity of the Dutch traders, and afforded them a convenient occasion for undermining the supremacy of their rivals. However this may be, the Christian religion did not make any great headway among the Siamese people. And while they conceded to the foreigners religious liberty, they showed no eagerness to receive from them the gift of a new religion.