“One consistent feature stood out: The samples all displayed a striking depletion of white blood cells within the lymph nodes and bone marrow, precisely the tissues that become packed with the feverishly dividing cells of lymphoma patients. Two Yale pharmacologists, Louis Goodman and Alfred Gilman, who had contracted to study the therapeutic effects of nitrogen mustard, made the connection. In a burst of imagination they entertained the possibility that the war gas possessed a dual nature, that it was a strange Jekyll-and-Hyde compound that could exist both on the battlefield and within a physician’s clinic.”