The doctor told Nan many curious things as they drove about together:  certain traits of certain families, and how the Dyers were of strong constitution, and lived to a great age in spite of severe illnesses and accidents and all manner of unfavorable conditions; while the Dunnells, who looked a great deal stronger, were sensitive, and deficient in vitality, so that an apparently slight attack of disease quickly proved fatal.  And so Nan knew that one thing to be considered was the family, and another the individual variation, and she began to recognize the people who might be treated fearlessly, because they were safe to form a league with against any ailment, being responsive to medicines, and straightforward in their departure from or return to a state of health; others being treacherous and hard to control; full of surprises, and baffling a doctor with their feints and follies of symptoms; while all the time Death himself was making ready for a last, fatal siege; these all being the representatives of types which might be found everywhere.  Often Dr. Leslie would be found eagerly praising some useful old-fashioned drugs which had been foolishly neglected by those who liked to experiment with newer remedies and be “up with the times,” as they called their not very intelligent dependence upon the treatment in vogue at the moment among the younger men of certain cliques, to some of whom the brilliant operation was more important than its damaging result.  There was, even in those days, a haphazard way of doctoring, in which the health of the patient was secondary to the promotion of new theories, and the young scholar who could write a puzzlingly technical paper too often outranked the old practitioner who conquered some malignant disorder single-handed, where even the malpractice of the patient and his friends had stood like a lion in the way.

But Dr. Leslie was always trying to get at the truth, and nobody recognized more clearly the service which the reverent and truly progressive younger men were rendering to the profession.  He added many new publications to his subscription list, and gleaned here and there those notes which he knew would be helpful, and which were suited to the degree of knowledge which his apprentice had already gained.  It is needless to say what pleasure it gave him, and what evening talks they had together; what histories of former victories and defeats and curious discoveries were combined, like a bit of novel-reading, with Nan’s diligent devotion to her course of study.  And presently the girl would take a step or two alone, and even make a visit by herself to see if anything chanced to be needed when a case was progressing favorably, and with the excuse of the doctor’s business or over-fatigue.  And the physicians of the neighboring towns, who came together occasionally for each other’s assistance, most of whom had known Nan from her childhood, though at first they had shrunk from speaking of many details of their professional work in her hearing, and covered their meaning, like the ostriches’ heads, in the sand of a Latin cognomen, were soon set at their ease by Nan’s unconsciousness of either shamefacedness or disgust, and one by one grew interested in her career, and hopeful of her success.