The reading of the "Address from Miss Nightingale" was one of the events of the nursing year. Sir Harry Verney, as chairman of the Nightingale Fund, often read the addresses to the assembled Probationers, but they were also printed, and a copy was given to each nurse. For the most part they were written for the Probationers at St. Thomas's, but from time to time Miss Nightingale sent a similar address to the Nightingale Nurses serving in Edinburgh. "The Nurses had been asking me only a few days before," wrote the Lady Superintendent (Jan. 6, 1875), "whether you had remembered them this year, and were going to write to them. Most of them prize your letters very much. They are trumpet-calls to duty and to greater efforts for a higher standard." In some years there was another "field-day" for the Nightingale Nurses, when a party of them were invited by Sir Harry and Lady Verney to Claydon, and a long summer day, passed in sauntering in the grounds or in lawn-tennis, ended with a short service in the Church. On one or two of these occasions, Miss Nightingale was able to be present, and photographs were taken of her seated in the midst of the nurses. V The high ideal of the Nurse's calling which Miss Nightingale cherished throughout her life, and strove to inculcate upon her disciples, explains her dislike of schemes of certification, registration, orders, and other professional organization. She was indeed much interested in, and she did much to promote, the practice of thrift and provident assurance among the Nurses.[161] But further than this, in the organization of nursing as a kind of trade union, Miss Nightingale was never inclined to go, and, as we shall hear in a later chapter, she was altogether opposed to a professional "register." There were those who maintained that the problem of improving Nursing was an economic problem; that good pay would attract good nurses; that the market was spoiled by the intrusion of "lady" volunteers. But to Miss Nightingale Nursing was a Sacred Calling, only to be followed by those who felt the vocation, and only followed to good purpose by those who pursued it as the service of God through the highest kind of service to man. There were those, again, who approached the problem from a point of view the opposite of the economic, and thought that a "religious" motive (in the ordinary sense of the term) was the sure way to good nursing, and who thus attached supreme importance to organization in "Orders," "Companies," and the like. To this view Miss Nightingale was equally opposed, because to her Nursing was an Art, and the essence of success was artistic training. A collection of passages, taken from a mass of correspondence, etc., on the subject,[162] may serve to make her point of view clear. "The Supply and Demand principle, taken alone, is a fallacy. It leaves out altogether the most important element, viz. the state of public opinion at the time.