For his eagerness to lengthen the reach of his arm and to extend the range of his voice, Dr. House found some satisfaction in occasional tours into the surrounding country. These were at once a relief from the exacting daily routine of the dispensary, a physical recreation, and an exploration of the regions seldom visited by Europeans. The first trip of any distance was made in company with Rev. Jesse Caswell during February, 1848, when the two took a ten day trip through the canals eastward to Petrui on the Bang Pakong River. In the next November, with Rev. Asa Hemmenway, he toured for a week to the west up the Meklong, with Rapri as the turning point. These early journeys were veritable explorations. The boatmen seldom knew the country more than two days’ distance from the capital. The doctor, in real explorer fashion, picked up in advance what little information he could, sketched rude maps and then on the journey directed or verified the course of the boat with a pocket compass. His technical knowledge served to great advantage. For future use, he records the directions by compass reading, the rate of speed and the distances as shown by the log, and notes natural objects which serve as landmarks. His skill at map making having been disclosed, some of the state officials requested him to draw, for their use, maps of the regions explored; and in discussing these with them he found that the officials were almost totally ignorant of the topography of the king’s domain away from the main water courses. As these tours were all conducted on the same general plan, the description of one will suffice for all. A native long-boat was used, having a low cylindrical canopy of matting at the center to afford some protection from the sun. A crew of six or eight men would man the oars, or push with poles in shallow canals or in the rapids. The travelling ordinarily would begin before daybreak; during the heat of the day the party would stop for meals and for rest; then late in the afternoon the voyage would be resumed, continuing till dark. If out over Sunday the travellers were scrupulous to observe the day; seeking, if possible, a desirable location for the day of rest, but sometimes tying up in disagreeable places rather than push on in the early hours of the Sabbath.