1 From Old Deadwood Days by Estelline Bennet, copyright 1935. Her conversation with George M. Butler, son of S.T. Butler. Estelline was an author and Chicago newspaperwoman, born in Deadwood, SD. Died in1948.

2 By Lloyd West, "F. L. Thorpe Family, F. L. Thorpe Company" From Some History of Lawrence County, Lawrence County Historical Society.

3 "Black Hills Gold manufacturers win trade name case" Rapid City Journal, 05/02/80.

Other sources:

Black Hills Jewelry Manufacturing Co., a South Dakota corporation; F. L. Thorpe Company, a South Dakota corporation and Stamper Jewelry Manufacturing, a South Dakota corporation, Plaintiffs
vs.
LaBelle's, a corporation,
and
Gold Rush, Inc., et al.,
and
Herberger's Department Store, a corporation,
Defendants
(Findings of Fact and Conclusions of Law, 05/01/80, US District Court, Andrew W. Bogue, United States District Judge).

Lawrence County, Dakota Territory Centennial 1861-1961.

"High court rules jewelry makers can sell wares as Black Hills Gold" Rapid City Journal, 07/01/83.

"Lawyers present arguments over Black Hills Gold" Rapid City Journal 01/19/83.

"Life-saving grapes inspired gold jewelry" by George Moses. Rapid City Journal, 08/19/90.

Brochures and company literature by:

F. L. Thorpe and Company
Landstrom's Original Black Hills Gold Creations
Stamper Genuine Black Hills Gold Jewelry