Dr J C Wagners slide cabinet, 1950-1991.

UNITED KINGDOM - MAY 31: Photograph taken in 2007 of the the extended drawers, labelled �1-40 MESO� and �41-78 MESO� containing original material prepared by Dr J C Wagner. The material relates to cases described in the Wagner, Sleggs and Marchand paper published in the British Journal of Industrial Medicine in 1960, famous for making the causal link between exposure to blue asbestos (crocidolite) and the lung cancer mesothelioma. (Photo by SSPL/Getty Images)