Letter from U.S. Attorney to N.R. Choudhury, Esq.
Letter from unnamed US Attorney to N.H. Choudhury, related to evidence in the 1917 Hindu-German Conspiracy Trial, during which Ghadar Party activists were charged with attempting to foment a rebellion in India.

Letter from U.S. Attorney to Hon. William Jennings Price
Letter from unnamed US Attorney to Hon. William Jennings Price, Envoy to Panama, in reference to Lennard de Castro, a witness for the prosecution against Bhagwan Singh and the other defendants in the 1917 Hindu-German Conspiracy Trial.

Letter from U.S. Attorney to Edwin B. Smith, Esq.
Letter from unnamed US Attorney to San Francisco lawyer Edwin B. Smith. Likely associated with the 1917 Hindu-German Conspiracy Trial, during which Ghadar Party activists were charged with attempting to foment a rebellion in India.

Letter from U.S. Attorney in San Francisco to U.S. Attorney in NYC
Letter from US Attorney John W. Preston in San Francisco to US Attorney Francis Gordon Caffey in New York. This letter is associated with the 1917 Hindu-German Conspiracy Trial, during which Ghadar Party activists were charged with attempting to foment a rebellion in India.

Letter from U.S. Attorney in San Francisco to the Attorney General
Letter from US Attorney John W. Preston in San Francisco to Attorney General Thomas Watt Gregory, in reference to Lennard de Castro, a witness for the prosecution against Bhagwan Singh and the other defendants in the 1917 Hindu-German Conspiracy Trial.

Correspondence
Cable from the Department of Justice in Washington, D.C. to the Chief of Police of the Panama Canal Zone, in reference to Lennard de Castro, a witness for the prosecution against Bhagwan Singh and the other defendants in the 1917 Hindu-German Conspiracy Trial.

Letter to U.S. Attorney in San Francisco
Letter from the Chief of Police of the Panama Canal Zone to US Attorney John W. Preston in San Francisco. The letter serves as an introduction to Lennard de Castro, a witness for the prosecution against Bhagwan Singh and the other defendants in the 1917 Hindu-German Conspiracy Trial.

Letter from U.S. Attorney in San Francisco to U.S. Attorney in Tucson
Letter from US Attorney John W. Preston in San Francisco to the US Attorney in Tucson, requesting that deportation proceedings be initiated against Naranjan Das. Das was a defendant in the 1917 Hindu-German Conspiracy Trial, during which Ghadar Party activists were charged with attempting to foment a rebellion in India.

Memorandum from C.H. Calhoun
Memorandum written by C.H. Calhoun, Director of Posts in the Panama Canal Zone. Calhoun relates the contents of a letter addressed to a Rala Singh in Panama, and advises Singh be investigated for possible connections with Giani Pritam Singh Dillon.

Telegram from U.S. Attorney in NYC to U.S. Attorney in San Francisco
Telegram from US Attorney Francis Gordon Caffey in New York to US Attorney John W. Preston in San Francisco. This telegram is associated with the 1917 Hindu-German Conspiracy Trial, during which Ghadar Party activists were charged with attempting to foment a rebellion in India.