One of the peculiar physical characteristics of Father Clark, even to old age, was his habit of walking. The ordinary mode of traveling for ministers and all other persons who journeyed, both men and women, was on horseback. Carriage roads were infrequent, and buggies, the vehicle of modern times for traveling, were seldom seen on these frontiers. Females rode on horseback to Kentucky and Tennessee, to see their friends, on journies from four to eight hundred miles. But Father Clark had some singular scruples against using a beast of burden; and to one of his personal friends he intimated a religious vow while on the circuit in Georgia, that so long as man oppressed his fellow man, he did not feel free to use a horse. He was never accustomed to the management of a horse, as every frontier man has been from childhood, and he felt unhappy, if not in real fear, while riding one. Hence in nearly every tour he made, he walked. In the summer of 1820, he made a preaching tour through the Boone’s Lick country to the extreme frontier settlement north side of the Missouri river, to a place called Bluffton. There was Dr. B. F. Edwards, a Baptist, with his young family from Kentucky, who received him cordially. No preacher of the gospel had then gone thus far in the vast west. Only a few families had reached that remote position, then on the border of the Indian country. There he preached the gospel in a small log cabin, and not even crowded with all the families within several miles. In the Boone’s Lick country, as the central part of Missouri was then called, he found a number of Baptist families, who claimed affinity with the “Friends to Humanity,” and aided them in forming themselves into a church connection. In going and returning, he preached almost daily, as he passed from settlement to settlement.