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.
Letter from U.S. Attorney to William M. Offley, Esq.
Letter from unnamed US Attorney to William M. Offley, Division Superintendent of the FBI in New York, 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 Mr. Black to John Preston
Letter from a Mr. Black, US Attorney, to US Attorney John W. Preston, informing him of a possible witness for the 1917 Hindu-German Conspiracy Trial, during which Ghadar Party activists were charged with attempting to foment a rebellion in India.