Having already learned Latin from the French priests, in 1845 (then about forty years of age), he invited Rev. Jesse Caswell, a missionary of the American Board, to become his tutor in English. To secure the services of Mr. Caswell he offered in return a reward which he perceived would be more prized than any fee of gold he could propose. He offered Mr. Caswell the privilege of using a room in one of the buildings connected with the watt for preaching the Christian religion and distributing tracts, and granted permission to the priests of the watt to attend if they wished. Mr. Caswell accepted the invitation and continued for three years, until his death, to teach English to the chief Priest of Buddhism in his own temple, and to preach Christianity to all who cared to listen. The esteem of the Prince for his tutor is evidenced by the fact that in 1855, when Dr. House was returning to America on furlough, he made the doctor the bearer of a gift of one thousand dollars to Mr. Caswell’s widow in token of appreciation of her husband’s services, and again in 1866, by the same agent, he sent a gift of five hundred dollars. He also caused a monument to be erected, in memory of his tutor, at the grave of Mr. Caswell.
The more one contemplates the terms made by Chao Fah Yai with Mr. Caswell the more astonishing it appears. Here is the most influential priest in all Siam, the recognised head of the Buddhistic cult in Indo-China, inviting into his watt an uncompromising teacher of the Christian religion notwithstanding the known antipathy of the king to the westerners and their religion, and in return for instruction in the English language he grants him freedom to teach the moral and religious doctrines of Christianity within the precincts of consecrated ground and permits novitiates and priests under his authority to listen to that doctrine.
This broadmindedness of Chao Fah Yai is further shown by an incident which he related to one of the Protestant missionaries. Sometime previous to the engagement of Mr. Caswell a young priest of the watt became a Roman Catholic. The prince was urged to flog the young man for abandoning the religion of his country. To this suggestion the prince said he replied: “The individual has committed no crime; it is proper for every one to be left at liberty to choose his own religion.” On a later occasion the Governor of Petchaburi, having forbidden the distribution of books by the Roman Catholic priests in his province because he said they sought to shield their converts from the authorities when accused of crime, conferred with Chao Fah Yai as to whether he should place the same ban on the books of the Protestants; but the Priest-Prince was able to explain to him the difference of policy between the Roman Catholics and the Protestants and to dissuade him from forbidding the distribution of Protestant literature.
From his intercourse with Mr. Caswell, Chao Fah Yai was quickened with an interest in Western learning, especially the sciences. By his association with these missionaries and the discussion of the evidences of Christianity he came to recognise that his own religion had accumulated a mass of unauthenticated teachings, the accretion of centuries of priestly fancy; and he perceived that this accretion must be sloughed off if his religion was to meet the pressure of foreign civilisation, which he foresaw could not be forever excluded. Accordingly he became the leader of a new party in Buddhism which rejected the uncanonical writings which had accrued to the extent of some eighty-four thousand volumes and held only to the authentic teachings of Buddha. As the leader of this new sect the Prince-Priest was doubtless responsible for the reinvigoration of the religion of Siam, enabling it better to meet the contest of time.
The interest of Chao Fah Yai in the American missionaries was more on account of their intellectual culture than on account of their religion. On one occasion in conversation with Dr. House he frankly said that while he did not believe in Christianity he thought much of Western science, especially astronomy, geography and mathematics. His interest in these subjects was very keen and practical. From the study of navigation he was led into the subject of astronomy, and took interest in the calculation of time, and was especially proud that his own calculation of an eclipse of the moon was almost identical with the Western almanac. His conversation showed considerable intelligence of the late developments in science. He was also a student of languages, and had a knowledge of several languages of eastern India, such as Singhalese and Peguan; he was familiar with Sanscrit, which had been a contributor to the Siamese language, and had studied Latin because he said he had been told that it was like the Sanscrit; besides these he was an expert student of the Pali, the sacred writing of Buddhism. The prince was also the first native prince of Farther India to procure a printing press, which he obtained from London, with fonts of English and Siamese type, and an alphabet of Pali of his own devising.
Apparently Chao Fah Yai approached the subject of Christianity as a vigourous mind approaches any ponderous subject that presents itself; he considered it philosophically. Every religion studied philosophically presents insuperable difficulties; a religion may be rightly judged only by its practical adaptation to life and its effects on the human heart. Had he attempted to study Christianity in a practical manner as he did the science of the West his conclusions would doubtless have been different. One evening the prince called at the home of Mr. Caswell just as the weekly prayer meeting was assembling and, upon invitation, remained to the meeting. His questions afterwards showed that he had given attention, for he inquired the meaning of such words as “redemption” and “Providence,” which he had heard used.
While it is a fact that on several occasions the prince emphatically disclaimed belief in the Christian doctrines, nevertheless the arguments of the missionaries were not without effect upon his mind, for he felt himself called upon to do an entirely new thing—to publish an apologetic for Buddhism in the points where the Christian arguments were most aggressive. In another manner also he gave evidence that the Christian arguments were pressing upon his conscience. The Baptist mission for some years had printed an annual almanac filled with Christian truth and containing, besides other items of civil information, a list of officials of the government and of the watts. In 1848, for the first time, Chao Fah Yai took exception to the religious character of the almanac in which his name appeared as head priest of his watt. He wrote to the editor of the almanac, expressing a “wish to have added to the description of myself in the English almanac ‘and hates the Bible most of all’; we will not embrace Christianity, because we think it a foolish religion. Though you should baptise all in Siam I will never be baptised.... You think that we are near the Christian religion; you will find my disciples will abuse your God and Jesus.”
Concerning his attitude to Christianity a comment from Mrs. Leonowens’ book, An English Governess at the Siamese Court, casts a little light:
“He had been a familiar visitor at the houses of American missionaries, two of whom Dr. House and Mr. Mattoon, were throughout his reign and life gratefully revered by him for that pleasant and profitable conversation which helped to unlock for him the secrets of European vigor and advancement, and to make straight and easy the paths of knowledge he had started upon. Not even his Siamese nature could prevent him from accepting cordially the happy influence these good and true men inspired. And doubtless he would have gone more than half way to meet them, but for the dazzle of the throne in the distance which arrested him midway between Christianity and Buddhism.”
This was the Priest-Prince upon whom the newcomers made their first call of respect. The acquaintance formed at this time ripened into a friendship that continued warm and true to the end. Dr. House, in his journal, carefully records the details of the call: