Gustav Nordenskiöld and Richard Wetherill excavated the Spruce Tree House in 1891 it is here that Gustav Nordenskiöld perfected his techniques. | Creator: National Park Service | Date: 1891 | Source: https://www.nps.gov/meve/learn/historyculture/cd_spruce_tree_house.htm | Rights: https://www.nps.gov/meve/learn/historyculture/cd_spruce_tree_house.htmDownload Original File
