Before revision: In the 1920s and 1930s, Australian-British archaeologist V. Gordon Childe and American archaeologist W. C. McKern independently began moving from asking about the date of an artifact, to asking about the people who produced it — when archaeologists work alongside historians, historical materials generally help answer these questions, but when historical materials are unavailable, archaeologists had to develop new methods.
After revision: In the 1920s and 1930s, Australian-British archaeologist V. Gordon Childe and American archaeologist W. C. McKern independently began moving from asking about the date of an artifact, to asking about the people who produced it – when archaeologists work alongside historians, historical materials generally help answer these questions, but when historical materials are unavailable, archaeologists had to develop new methods.