Series I: Business Correspondence
Outgoing Correspondence, 1908 January 22 – 1908 April 29
Outgoing Correspondence, 1908 May 6 – 1909 December 30
Outgoing Correspondence, 1910 January 3 – 1910 April 26
Outgoing Correspondence, 1910 May 2 – 1910 December 21
Outgoing Correspondence, 1911 January 5 – 1911 May 13
Series II: Field Correspondence
Field Correspondence: W.L. Clark, 1906 September 20 – 1907 May 10
Field Correspondence: W.L. Clark, 1907 June 1 – 1907 December 27
Series III: Business Papers