It is a great pleasure to have been asked to deliver the Society's Craig Lecture, and I very much appreciate the honor. The prospect of doing so, however, stimulated me to go back to descriptions of Col. Craig and his career, in hopes of finding something specific to which I could relate. His primary contribution to military medicine, it seems to me, in addition to a remarkable diversity of publications on both bacterial and parasitic diseases, was to stress the importance and development of diagnostic laboratory procedures for tropical diseases. Craig also was editor of the American Journal of Tropical Medicine for 19 years and closed his career at Tulane, where he wrote the famous textbook on clinical parasitology with Faust. Thus, there are two features that I perhaps have in common with the namesake of this lectureship: first an interest in both clinical and laboratory aspects of many different diseases of the tropics, a matter to which I will return; and second also being a coauthor of a textbook of clinical parasitology, hopefully one that might be equally valuable!