Mr. Casaubon had no second attack of equal severity with the first, and in a few days began to recover his usual condition. But Lydgate seemed to think the case worth a great deal of attention. He not only used his stethoscope (which had not become a matter of course in practice at that time), but sat quietly by his patient and watched him. To Mr. Casaubon's questions about himself, he replied that the source of the illness was the common error of intellectual men -- a too eager and monotonous application: the remedy was, to be satisfied with moderate work, and to seek variety of relaxation.