We are heading down to Falls Park to check out the historical marker Prison Quarry!

Newspapers.com

https://www.argusleader.com/story/life/2014/10/05/looking-back-state-prison-complete/16586823/

Bulletin of the United States Bureau of Labor Statistics - Google Books

South Dakota State Penitentiary :: SD Dept. of Corrections

South Dakota State Penitentiary - Wikipedia

Wallace L. Dow - Wikipedia

NPGallery Asset Detail (nps.gov)

Page 1390 History of Dakota Territory History of Dakota Territory - Google Books

1890 Biennial Report Biennial Report - Google Books

Biennial Report of the Board of Charities and Corrections, State of South D... - Google Books

What People Really Make (and Spend) Behind Bars : Planet Money : NPR