- Elizabeth J. Johnson - Pawtucket History Research Center
- US Library of Congress
- Heritage Alliance of Pawtucket
- Pawtucket Public Library
- History Colorado
- Siskiyou County Museum
- Pueblo County Historical Society
- Fountain Valley Historical Society and Museum
- US Library of Congress: Journals of a Pioneer Argonaut, Daniel Jenks
- US Library of Congress: Daniel Jenks Collection
- Daniel Jenks gold rush era drawings courtesy US Library of Congress
- Colorado’s Cherokee Trail -- Richard and Mary Ann Gehling
- The Pike's Peakers -- Richard and Mary Ann Gehling
- Hall's 1895 History of Colorado; Volume 4
- Glenn Scott's 1975 USGS Historic Trail Maps of the Pueblo Quadrangle Investigation
- Trails West
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