Occasionally one finds a startling bit of anticipation of what is most modern, in medicine as well as in surgery. For instance, toward the end of the Thirteenth Century, a distinguished English professor of medicine, known as Gilbert, the Englishman, was teaching at Montpelier, and among other things, was insisting that the rooms of patients suffering from smallpox should be hung entirely with red curtains, and that the doors and the windows should be covered with heavy red hangings. He claimed that this made the disease run a lighter course, with lessened mortality, and with very much less disfigurement. Smallpox was an extremely common disease in the Thirteenth Century, and he probably had many chances for observation. It is interesting to realize that one of the most important observations made at the end of the Nineteenth Century by Dr. Finsen, the Danish investigator whose studies in light and its employment in therapeutics, drew to him the attention of the world, and eventually the Nobel prize of $40,000 for the greatest advance in medicine was, that the admission of only red light to the room of smallpox patients modified the disease very materially, shortened its course, often prevented the secondary fever, and almost did away completely with the subsequent disfigurement. It is evident that these men were searching and investigating for themselves, and not following blindly in the footsteps of any master. It has often been said that during the Middle Ages it was a heresy to depart, ever so little, from the teaching of Galen. Usually it is customary to add that the first writer to break away from Galen, effectually, was Vesalius, in his De Fabrica Corporis Humani, published toward the end of the second quarter of the Sixteenth Century. It may be said, in passing, that, as a matter of fact, Vesalius, though he accomplished much by original investigation, did not break so effectually with Galen as would have been for the best in his own work, and, especially, for its influence on his successors. He certainly did not set an example of independent research {90} and personal observation, any more fully, than did the medical teachers of the Thirteenth Century already mentioned, and some others, like Mondaville and Arnold of Villanova, whose names well deserve to be associated with them.