It is difficult, as may be imagined, to define with precision the earliest description of scurvy, as the older references are so vague as to be open to individual interpretation. The reference of Hippocrates to a large number of men in the army who suffered from pains in the legs and gangrene of the gums, which was accompanied by loss of teeth, seems sufficiently definite to be identified as this disease. The Greek, Roman and Arabian writers do not seem to have been acquainted with scurvy. This is as we should expect, for fruits and vegetables grew in such plenty in these southern countries that scurvy must have been a disorder of rare occurrence. An interesting early description of scurvy, and one which is quite convincing, is that of de Joinville, who accompanied the Crusaders in their invasion of Egypt under St. Lewis, about the middle of the thirteenth century. He refers to the lividity and spongy condition of the gums, and describes how "the barber surgeons were forced to cut away the dead flesh from the gums to enable the people to masticate their food"; he describes their debility, their tendency to faint, and the black spots on their legs. The disease broke out in Lent, during which time the soldiers partook of no meat, but consumed a species of eel which they believed "ate the dead people" and therefore led to this loathsome disease. It is probable that scurvy existed in the northern parts of Europe and Asia ever since they were settled by man. We should hardly expect to have records of this condition, in view of the low educational status of the people, their greatly restricted literature, and their lack of intercourse with the people in the southern countries. In the sixteenth century, with the development and spread of education, we begin to hear of scurvy from various sources. Claus Magnus, in his "History of the Northern Nations," published in 1555, described the disease which he tells us flourished among the soldiers in the camps and in the prisons. About this time Ronsseus, Echtius and Wierus wrote special treatises on this disease, and recommended many dietary measures which we recognize to-day as most efficacious. The number of monographs on this subject multiplied with great rapidity in the course of the next twenty-five or fifty years; none of them, however, added anything essential to our knowledge. In 1645 the Faculty of Medicine at Copenhagen published a "consilium" for the benefit of the poor, treating of the causes, prevention and cure of this disease, which was prevalent among the Danes and other northern nations.