Second Michigan Cavalry (History, link)

Second Michigan Cavalry in Portraits and Biographies
https://archive.org/stream/bad0928.0001.001.umich.edu#page/70/mode/2up
Internet Archives

Hillsdale College, Hillsdale County, Michigan in Portraits and Biographies
http://bit.ly/HillsdaleCollege-in-Portraits-and-Biographies-181

Google Books (short URL)

Robert McDougall, 2nd Michigan Cavalry.
http://bit.ly/RobertMcDougall-of-HillsdaleMichigan-Portraits-and-Biographies-671
Google Books (short URL)