Historians rely on secondary historical sources almost as much as they rely on primary historical sources. But what are secondary historical sources and how do they help historians know what they know about the past? Michael McDonnell, an Associate Professor of History at the University of Sydney, guides us through how he used secondary historical sources to investigate the pivotal role Native Americans played in the history of the Great Lakes region and early North America.   Doing History Series This episode is part of the "Doing History: How Historians Work" series.  “Doing History” episodes will introduce you to historians who will tell you what they know about the past and reveal how they came to their knowledge. Each episode will air on the last Tuesday of each month in 2016. This series is part of a partnership between Ben Franklin’s World and the Omohundro Institute of Early American History and Culture. Show Notes: http://www.benfranklinsworld.com/088