Not many hospitals overseas had a larger experience in the World War than the unit of McGill University, Montreal (Canadian General Hospital Number 3). From Aug. 17, 1915, to May 12, 1919, 143,762 patients were admitted. Within its walls and under its tents more than 1,900 persons died. This is an account of the hospital from its conception by the dean of the faculty of medicine of Montreal, Dr. H. S. Birkett, who was its commanding officer until 1917. The story is one of great loyalty and devotion to the care of sick and mangled men. There were a few happy occasions when royalty, Sir William Osler and prominent officers of the allied armies visited the hospital, but the undertone of the story is sad. The wounded suffered not alone. Lieut. Col. John McCrae, chief medical officer, wrote in his diary in January, 1917, "The cruel cold is still holding.