Lease. James Gavin leases to S. A. Heilner and wife, the Robert Kitchen Mining Claim, July 17, 1900–December 1, 1900. Dated July 17, 1900.

Photograph of Neuberger & Heilner department store in early 1900s. Dated 1900.

Transcription of a letter from Neuberger family to Clara and Sigmund Heilner. Berthold Neuberger arrives from Germany and joins his brother, Gerson, in Baker, Oregon where both brothers will become business partners with their first cousin, Sanford Heilner. Berthold and Gerson are nephews to Clara Neuberger Heilner. Dated December 17, 1900.

Sigmund Heilner list of articles pertaining to the Mammoth Mine. Dated January 1, 1901.

Transcription of a letter from Newton Bissinger to Sigmund Heilner. Newton Bissinger writes his brother-in-law, Sigmund Heilner a tender business letter showing inter-family networking. Dated April 19, 1901.

Deed. Alfred Casanbon sells to S. A. Heilner for $1.00 The Casanbon Quartz Mining Claim. $12,000 to be paid to Casanbon by January 1, 1902. Dated May 27, 1901.

Photograph of Sanford Heilner at about age 18. Dated 1901.

Bill of sale. J. W. Barber sells to S.A. Heilner six cows, three yearling heifers, a yearling bull and two suckling calves for $159.00. Dated July 31, 1901.

Check paid to George W. Foster by S.A. Heilner, $156.00. Dated October 3, 1901.

Deed. Revised lease of Deed originally written May 27, 1901. Dates change. Lease will extend to January 1, 1903 at which time S. A. Heilner will purchase The Casanbon Quartz Mine for $12,000. Dated January 3, 1902.