Charles Doolittle Walcott Excavating Burgess Shale, by Unknown, c. 1915, Smithsonian Archives - History Div, Charles Doolittle Walcott (1850-1927), paleontologist and fourth Secretary of the Smithsonian Institution (1907-1927). Walcott, along with two other men, is shown excavating the Burgess Shale in British Columbia, Canada. Walcott is the man with the wide brim hat..