Keywords: Leffingwell cropped.JPG en Ernest deKoven Leffingwell This version extensively cropped to make a head shot U S Geological Survey Photographic Library http //libraryphoto cr usgs gov/cgi-bin/search cgi search_mode noPunct free_form lek00253 free_form free_form free_form credited to Ernest deKoven Leffingwell; cropped by uploader 2010; original circa 1906-1910 original is File Leffingwell USGS lek00253 jpg PD-USGov-USGS Explorers of the Arctic Geologists from the United States Geographers from the United States Male fur headgear Fur fashion in 1908 |