So he made a number of operations of the appendicitis using his own method, and then he was able to present in 1896 at the Academy of Medicine statistics of one hundred consecutive unselected appendicitis cases with a death rate of 2 per cent. His first formal presentation of these "principles of the Fourth Era of Surgery" (as he named it) was made before the Section of Surgery and Anatomy of A. M. A. and reported in the "Transaction" of the year. He also presented it at the International Medical Congress in Budapest in September 1909, and published his idea in "Surgery, Gynecology and Obstetric" for December. And he also published a book, "Dawn of the Fourth Era in Surgery" in 1910.