The acquaintance thus conventionally begun was quickened in mutual interest in an unexpected manner. When Dr. House reached Siam he found that the Baptist Mission press had for some time been publishing an annual almanac. He perceived that these almanacs were not only accepted by the ordinary people as they would accept Scripture tracts, but that they were eagerly sought after by a small number of nobles who were interested in Western science. These men were surprised to find that the eclipse for 1847 was much more accurately forecasted in this almanac than by their own astrologers, and they were eager to discuss the subject of astronomy. This observation together with his own interest in science led him, in September of his first year, to institute a series of lectures for the benefit of the servants and employes of the mission compound “in hopes of waking up their dormant minds and accustom them to think, and so be a little benefitted by the preaching on the Sabbaths; as well as to impart useful information and to set before them the great proof of the existence and wisdom of the Creator, a fundamental truth all Buddhists deny.” The doctor was to furnish the outlines and perform the experiments while Mr. Caswell, experienced in the language, was to do the talking. There was a fair equipment at hand: chemicals, a magnetic machine, a globe, a set of physiological and hygienic charts and a skeleton. The first lecture was on the digestion of food and the effects of alcohol on the stomach. The audience showed their attention and interest by responding with questions. After the lectures on physiology came several on astronomical topics such as the eclipse of the moon, phases of the moon and relation to the tides; then followed several on the gases. On the occasion of the first lecture on the gases, it so happened that Godata, a priest from Chao Fah Yai’s watt, happened to call on Mr. Caswell and was invited to witness the experiment. The demonstration opened a new world for him. What he saw was too wonderful to keep to himself; he spread abroad his report and the effect was immediate.