Dear Mr. Capuder,
Thank you for posting your request on History Hub!
We searched the National Archives Catalog and located the Congressional Jurisdiction Case Files, 1/10/1884 - 5/19/1943 in the Records of the U.S. Court of Claims (Record Group 123) and the Congressional Jurisdiction Case Files, 1884 - 1944 in the Records of the Court of Claims Section (Justice) (Record Group 205) that are arranged by the U.S. Court of Claims case file number and may contain the trial transcripts you seek. The series United States Court of Claims Docket Cards for Congressional Case Files, 1884 - 1943 (M2007) in Record Group 123 acts as an index to these two series. For instance, Ducamp may be listed on Roll 2. For more information about these records, please contact the National Archives at Washington, DC - Textual Reference (RDT1) at firstname.lastname@example.org. Please review the Southern Claims Commission Case Files for further explanations.
We also located the series titled Letters Received, 1805 - 1889 in the Records of the Adjutant General's Office, 1762 - 1917 (Record Group 94) that includes the digitized file unit 1882 - File No. 3025 - Duchamp, Eugene. The file unit is available using the Catalog.
Due to the COVID-19 pandemic and pursuant to guidance received from the Office of Management and Budget (OMB), NARA has adjusted its normal operations to balance the need of completing its mission-critical work while also adhering to the recommended social distancing for the safety of NARA staff. As a result of this re-prioritization of activities, you may experience a delay in receiving an initial acknowledgement as well as a substantive response to your reference request from RDT1. We apologize for this inconvenience and appreciate your understanding and patience.
We hope this is helpful. Best of luck with your research!