Mr. Clark taught the youngsters about Bellefountaine, New Design, and the “Bottom,” at various intervals for eight or ten years. Though other teachers met with the customary Christmas frolic, and were dethroned, Mr. Clark was an exception. Not one of the roguish young men in the settlements would offer him such an insult. Those pupils who were kept under proper government at home, made no trouble in the school. But there were wild and rude young lads, who were devoid of self-respect, and required the application of the hazel and hickory. One of our old friends, now past the age of threescore and ten, was a student of Mr. Clark, at times, for several years, and received ample qualifications under his tuition for the official duties of marshall under the territorial government, and who also has been a useful teacher. Of him we have made special inquiry how he managed these insubordinate youngsters, and how their rebellious habits affected his temper and patience. His response is, that on some occasions he thought him to be slightly irritated, that occasionally he had to use the rod, that he would have order in his school, and that he always discriminated between criminality and dullness.[49] The modern contrivances for teaching arithmetic and the elements of mathematics were then unknown. The rules were written out by the teacher, and the sums when worked right were all copied in a book. Not long since we looked over a book preserved by another student, with the date of 1806, then twenty-one, now verging to seventy years of age.[50] A third, and one who for almost half a century, has been esteemed as one of our ablest and most successful ministers, (as has also his brother just named,) acknowledges himself as having received special aid from this pioneer preacher in preparing him for the ministry. This person in earlier life performed a prominent part in the public affairs of the territorial and state governments. In addition to minor branches, he studied mathematics, logic, rhetoric, history and philosophy. This minister, as several others have done, acknowledges his indebtedness to Father Clark for his valuable aid in those branches specially relating to the profession of the ministry.[51] Many others who shared the benefits of his instruction have long since followed their beloved teacher to “that bourne from whence no traveler returns.”