Note. Sheriff of Baker County sends notice to Sigmund that taxes for 1898 amounting to $783.66 are overdue. Dated January 15, 1900.

Tax Receipt received from S. A. Heilner and Clara Heilner for the year 1898 for $783.66. Dated February 2, 1900.

Agreement. Sigmund Heilner and Clara Heilner grant F. S. Lack an extension on purchase of Mammoth Mine for sum of $5000.00. Balance of $25,000 to be paid by January 1, 1901. Dated March 13, 1900.

Deed. Clara and Sigmund Heilner in consideration of $30,000 to them paid by The Mammoth Gold Mining Company, a corporation of Baker County. Dated April 30, 1900.

Receipt from Mammoth Gold Mining Company. $5000.00, part payment of purchase price of Mammoth Mine to Sigmund and Clara Heilner by F. S. Lack. Dated April 30, 1900.

Deed. Mary Richardson sells to S. A. Heilner property in Baker County, Oregon for $1.00. Dated May 1, 1900.

Receipt showing S. A. Heilner and wife paid to Mary Richardson $3000.00. Dated May 1, 1900.

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.