The institution has never been endowed, and therefore, if the work was to grow, it was necessary to make money. The authors of this book have seen and read the legal documents by which Dr. Kellogg turned over to the American Missionary Association nearly everything of which he was possessed. The value of his work as a surgeon, estimated at prevailing rates for such work, would be at least fifty to sixty thousand dollars yearly. He touches not a cent of this money, nor does he touch his salary as superintendent—which he himself placed at the figure of twelve hundred dollars. There are many other physicians connected with the institution who, as specialists in New York or Chicago, would be in receipt of large incomes, but they are as content as is Dr. Kellogg to accept a bare pittance, finding their joy in the work they are doing.[3] [3] The reader must be warned that there are many charlatans and shrewd business men who have taken advantage of the work of Dr. Kellogg and of the prestige of the name “Battle Creek.” The energy displayed by the faculty and staff of the University of Health in carrying on their work is nothing less than astonishing. During one week when the writers were at the Sanitarium, there were more than a thousand patients all told, including the non-paying ones. There are many days when Dr. Kellogg operates from early in the morning until late at night, having very many highly difficult and dangerous operations to perform, for he is well known as a surgeon. After such a long day in the operating room, without a break for food or rest, he will give one of his lectures to the patients, or go the rounds of the wards, winding up the day by attending to a mass of business or writing or studying in his laboratories. He works continually, day in and day out, for eighteen hours a day; and this he has done for the past thirty-five years or so. He wrote one bulky book containing much technical and scientific matter in ten days, using three or four stenographers, and working in stretches of twenty hours at a time. He has never taken a holiday. All of his many journeys abroad or in this country are on matters connected with his mission in life; and while on his journeys he is continually writing or studying, and carrying on the direction of his multitudinous affairs by letter or telegraph. Yet to-day, at the age of fifty-five, he shows no signs of diminution of energy; no signs of nervous breakdown, or of the ailments which bring thousands of business men and women to him for treatment.